Merge pull request #502 from yukitos/master

Update ja/library/Http.fsx following changes of the original document.
Release Beta 3
Disable WorldBank and Freebase tests in TeamCity (closes #322)
Fix typo
Remove not relevant and undocumented response headers, now they are strings
Test PCL on mono
Update to F# 3.1.1.5
Enable PCL tests on mono
Put everything on same solution now that mono supports pcl's
Merge pull request #508 from ovatsus/master

Put everything on same solution now that mono supports pcl's
Update README.md
Update README.md
Update AssemblyResolver.fs
Attempt to fix #507
Update readme
Ghana no longer has 2 different iso codes
Merge pull request #509 from ovatsus/master

Attempt to fix #507
Seriously Freebase?
Fix bad printing of option.Value as None
Always generate default constructor when possible