Test on jruby-19mode, rbx-19mode and ruby-head.
Add required gemspec attributes name and summary.

According to rubygems docs following gemspec attributes are required:
* name
* version
* summary

http://docs.rubygems.org/read/chapter/20#name
http://docs.rubygems.org/read/chapter/20#version
http://docs.rubygems.org/read/chapter/20#summary

Before this patch specs failed on all 1.8 rubies with error:
> catch nil is not a symbol TypeError`

See carlhuda/bundler#2131

Specs for ree on Travis have been disabled in this commit
gregorym/bump@ec5be88

After this patch specs pass again on 1.8.
Run specs on 1.8 rubies again.
Merge pull request #17 from splattael/travis

Test on jruby-19mode, rbx-19mode and ruby-head.
Merge pull request #18 from splattael/fix-18-builds

Generate a valid gemspec fixing builds for 1.8 rubies.
v0.3.6
extract code duplication in a private method.
make rake -T show bump tasks
Merge pull request #19 from grosser/public

make rake -T show bump tasks
v0.3.7
Add possibility to bump version in lib/*.rb file

- All tests pass
- Little bit change in gemspec to add dev deps here
- Add tests to coverage new feature
Remove bundler from development deps
Accept only if VERSION in main lib is not preceed by nothing and do alittle mess with tests.
Merge pull request #20 from hauleth/extract-version-from-gem.rb

Add possibility to bump version in lib/*.rb file
v0.3.8