Implemented codecov.

appveyor.yml

@@ -43,7 +43,8 @@ build_script:
 - cmd: >-
     dotnet pack src\ImageSharp --configuration Release --output "artifacts\bin\ImageSharp"
 
-test: off
+test_script:
+- tests\CodeCoverage\CodeCoverage.cmd
 
 artifacts:
 - path: artifacts\bin\ImageSharp\**\*.nupkg

tests/CodeCoverage/CodeCoverage.cmd

@@ -0,0 +1,11 @@
+@echo off
+
+nuget restore -PackagesDirectory .
+
+cd ..\ImageSharp.Tests
+
+..\CodeCoverage\OpenCover.4.6.519\tools\OpenCover.Console.exe -register:user -target:"C:\Program Files\dotnet\dotnet.exe" -targetargs:"test -c Release" -excludebyattribute:*.ExcludeFromCodeCoverage* -hideskipped:All -oldStyle -output:.\ImageSharp.Coverage.xml
+
+SET PATH=C:\\Python34;C:\\Python34\\Scripts;%PATH%
+pip install codecov
+codecov -f "ImageSharp.Coverage.xml"

tests/CodeCoverage/packages.config

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<packages>
+  <package id="OpenCover" version="4.6.519" />
+</packages>