Fix build product path to work on case sensitive and insensitive file systems (#116)

Author: hybridcattt

Makefile

@@ -1,7 +1,7 @@
 install:
 	swift package update
 	swift build -c release
-	install .build/Release/SplashHTMLGen /usr/local/bin/SplashHTMLGen
-	install .build/Release/SplashMarkdown /usr/local/bin/SplashMarkdown
-	install .build/Release/SplashImageGen /usr/local/bin/SplashImageGen
-	install .build/Release/SplashTokenizer /usr/local/bin/SplashTokenizer
+	install .build/release/SplashHTMLGen /usr/local/bin/SplashHTMLGen
+	install .build/release/SplashMarkdown /usr/local/bin/SplashMarkdown
+	install .build/release/SplashImageGen /usr/local/bin/SplashImageGen
+	install .build/release/SplashTokenizer /usr/local/bin/SplashTokenizer

README.md

@@ -163,7 +163,7 @@ If you want to use Splash through one of its built-in command line tools, start
 
 ```
 $ git clone https://github.com/johnsundell/splash.git
-$ cd Splash
+$ cd splash
 ```
 
 To run a tool without installing it, you can use the Swift Package Manager's `run` command, like this:
@@ -191,7 +191,7 @@ If you only wish to install one of these, compile it and then move it to `/usr/l
 
 ```
 $ swift build -c release -Xswiftc -static-stdlib
-$ install .build/Release/SplashHTMLGen /usr/local/bin/SplashHTMLGen
+$ install .build/release/SplashHTMLGen /usr/local/bin/SplashHTMLGen
 ```
 
 ## Contributions and support