Merge pull request #7 from siywilliams/develop

a few enhancements for the next version
Merge pull request #8 from siywilliams/develop

add msbuild to get xunit tests running in TC
values which contain whitespace need to be wrapped in double quotes as .net strips them out
Merge branch 'develop' of github.com:fclp/fluent-command-line-parser into develop