Merge pull request #40 from mausch/master

Do not include custom cultures in CultureInfo generation.
Add CI build for AppVeyor.
Replace build.ps1 with build.cmd.

Hopefully this works better with AppVeryor; the ps1 script was not
passing on the status code of FAKE so the build showed up as success
even though it failed.
Update README
Documentation fixes.
Update release notes.
Add build scripts and solution for Mono.
Remove old Mono Makefile.
Remove unused vsmdi file.
Update sln file to VS2013.
Try Travis CI build for Mono.
Remove old nuget ps1 script.
Try chmod +x on build.sh for Travis.
Change Travis target to RunTests.
Getting weird error in Travis. Try latest Mono.
Fix Mono download link.
Check null CultureInfo when shrinking.
Mono sometimes returns a null parent culture