Regenerate gemspec for version 3.7.0

Regenerate gemspec for version 3.6.0

Version bump to 3.5.1

Regenerate gemspec for version 3.5.0

Regenerate gemspec for version 3.4.2

bump for rerelease due to ruby-1.8.7 and ruby-1.9.2 incompatibility i…

…ssue

preparing for 3.4.0

version 3.3.4

. preparing for 3.3.3

. preparing for 3.3.2