add Matt Hutchinson to primary authors list
rubyforge_project is deprecated

ancient really
specify minimum ruby version

set to >=1.8.7 since thats currently the minimum we test.
add external requirements

as per the ruby gems spec:
“List the external (to RubyGems) requirements that must be met for this
gem to work. It's simply information for the user.”

http://guides.rubygems.org/specification-reference/#requirements
longer form description from website
minor formatting cleanup
test against ruby-head

ruby 2.2 isn’t that far off so we should know about potential breaks
:notes: when two (lines of code) become one :notes:
Merge pull request #228 from mroth/gemspec-fixup

Minor gemspec fixup
Merge pull request #229 from mroth/update-travis

Update travis-ci to test against ruby-head