Add build status on README

Author: arcage

README.md

@@ -1,5 +1,7 @@
 # EMail for Crystal
 
+[![Build Status](https://travis-ci.org/arcage/crystal-email.svg?branch=master)](https://travis-ci.org/arcage/crystal-email)
+
 Simple email sending library for the [Crystal programming language](https://crystal-lang.org).
 
 You can:

docs/EMail.html

@@ -175,28 +175,28 @@ <h2>
   </h2>
 
 
-      <a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/address.cr#L2" target="_blank">
+      <a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/address.cr#L2" target="_blank">
         email/address.cr
       </a>
 
     <br/>
 
 
-      <a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/concurrent_sender.cr#L155" target="_blank">
+      <a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/concurrent_sender.cr#L155" target="_blank">
         email/concurrent_sender.cr
       </a>
 
     <br/>
 
 
-      <a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/mimetype.cr#L1" target="_blank">
+      <a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/mimetype.cr#L1" target="_blank">
         email/mimetype.cr
       </a>
 
     <br/>
 
 
-      <a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email.cr#L10" target="_blank">
+      <a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email.cr#L10" target="_blank">
         email.cr
       </a>
 
@@ -316,7 +316,7 @@ <h2>
       <br/>
       <div>
 
-          [<a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email.cr#L39" target="_blank">View source</a>]
+          [<a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email.cr#L39" target="_blank">View source</a>]
 
       </div>
     </div>
@@ -356,7 +356,7 @@ <h2>
       <br/>
       <div>
 
-          [<a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email.cr#L68" target="_blank">View source</a>]
+          [<a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email.cr#L68" target="_blank">View source</a>]
 
       </div>
     </div>

docs/EMail/Client.html

@@ -188,14 +188,14 @@ <h2>
   </h2>
 
 
-      <a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/client/config.cr#L1" target="_blank">
+      <a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/client/config.cr#L1" target="_blank">
         email/client/config.cr
       </a>
 
     <br/>
 
 
-      <a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/client.cr#L5" target="_blank">
+      <a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/client.cr#L5" target="_blank">
         email/client.cr
       </a>
 
@@ -360,7 +360,7 @@ <h2>
       <br/>
       <div>
 
-          [<a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/client.cr#L23" target="_blank">View source</a>]
+          [<a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/client.cr#L23" target="_blank">View source</a>]
 
       </div>
     </div>
@@ -395,7 +395,7 @@ <h2>
       <br/>
       <div>
 
-          [<a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/client.cr#L20" target="_blank">View source</a>]
+          [<a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/client.cr#L20" target="_blank">View source</a>]
 
       </div>
     </div>
@@ -419,7 +419,7 @@ <h2>
       <br/>
       <div>
 
-          [<a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/client.cr#L87" target="_blank">View source</a>]
+          [<a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/client.cr#L87" target="_blank">View source</a>]
 
       </div>
     </div>
@@ -442,7 +442,7 @@ <h2>
       <br/>
       <div>
 
-          [<a href="https://github.com/arcage/crystal-email/blob/1690de8774f30786adc326ae9b46b4a849111b30/src/email/client.cr#L41" target="_blank">View source</a>]
+          [<a href="https://github.com/arcage/crystal-email/blob/3ea7742ee7659c8ba5c52fa1b14bbc1a6507996a/src/email/client.cr#L41" target="_blank">View source</a>]
 
       </div>
     </div>