Bump version to 0.3.0. Biggest changes are to fcall/nfcall API changes

Hello @nicks, 

Please review the following commits I made in branch 'nick-version'.

12fc7c7b45d402fa7a22a6a8f317bd9938400727 (2013-11-01 11:59:51 -0400)
Bump version to 0.3.0. Biggest changes are to fcall/nfcall API changes

Check list:


R=@nicks
VISIBLE_CHANGES=Bump version to 0.3.0. Biggest changes are to fcall/nfcall API changes