FIXES #5: accepts quoted value for header field 'algorithm'
Merge pull request #8 from ihanli/master

Allow quoted value for header field 'algorithm'
Run tests with ruby 2.0.0 on travis
Use minitest 5 classes
Add #5 and #8 to history, set version
Set license in gemspec.

Fixes #9
Update travis versions
Fix minitest 5 test class name

The minitest 4 constant was being used which does not work on ruby-head
Declare minitest development dependency
Merge remote-tracking branch 'upstream/master'