Fixed section labels causing panic on windows.
The filename path was being split using a unix specific path seperator.  This fix uses the os.PathSeperator to ensure proper evaluation regardless of platform.
Updating the .gitignore for windows and vim users.

Adding hugo.exe for us windows fanbois.  Also adding gvim support.
Adding error message when no content pages exists.
Merge pull request #10 from noahcampbell/master

Fixed section labels causing panic on windows.