Update gemspec to reflect renaming to README.md
Bump virtus dependency to ~> 0.5

This makes it possible to have dm-core coexist
with veritas and friends.

virtus 0.5 hasn't yet been released so virtus is
pinned to github in the Gemfile for now.
Use https for github clone URLs in the Gemfile
Support using bundler 1.0.x
add unit test for testing singularization of 'status' and 'alias'
add fix for singularization
Merge pull request #213 from panarom/master

correct singularization of status (and alias)
changes to support multiple threads in jruby--fixes github issue #188
Merge pull request #214 from toddtomkinson/release-1.2

Change to support multiple threads in jruby--fixes github issue #188