Fix CI (#69)

* Add julia 1.1 and x64 to CI config, fix nightly build config

* Fix typo in travis ci that prevented coverage info from uploading

* Add travis and codecov badge to README

* Add OSX to travis runs

.travis.yml

@@ -1,10 +1,12 @@
 language: julia
 os:
   - linux
+  - osx
 julia:
   - 1.0
+  - 1.1
   - nightly
 notifications:
   email: false
 after_success:
-  - julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage Codecov.submit(process_folder())'
+  - julia -e 'using Pkg; Pkg.add("Coverage"); using Coverage; Codecov.submit(process_folder())'

README.md

@@ -1,5 +1,8 @@
 ### Tables.jl
 
+[![Build Status](https://travis-ci.org/JuliaData/Tables.jl.svg?branch=master)](https://travis-ci.org/JuliaData/Tables.jl)
+[![Codecov](https://codecov.io/gh/JuliaData/Tables.jl/branch/master/graph/badge.svg)](https://codecov.io/gh/JuliaData/Tables.jl)
+
 The Tables.jl package provides simple, yet powerful interface functions for working with all kinds tabular data through predictable access patterns.
 
 ```julia

appveyor.yml

@@ -1,10 +1,12 @@
 environment:
   matrix:
   - julia_version: 1.0
-  - julia_version: latest
+  - julia_version: 1.1
+  - julia_version: nightly
 
 platform:
   - x86 # 32-bit
+  - x64 # 64-bit
 
 branches:
   only: