Add Visual Studio to .gitignore
Change SDL include convention
Fix malformed main in examples
Add VisualStudio2013Express solution&project files
Add VisualStudio2013Express window example
Add VisualStudio2013Express view example
Add VisualStudio2013Express text example
Add VisualStudio2013Express sprite example
Add VisualStudio2013Express offscreen drawing example
Add VisualStudio2013Express colors example
Change Visual Studio build directory