Fail fast
Add #licenses declaration to gemspec
Add pry-nav development dependency
Revert "use extract_options! from the Twitter gem"

This reverts commit a63942dec7099efc74bc3d6bdae76a287de1d0ef.

Closes #107.
test against more versions of twitter gem
only test twitter gems > 4.0
Replace pry-nav with pry-debugger

The developers of pry-nav recommend switching to pry-debugger on MRI
1.9.2 or greater.
pry-debugger causes tests to fail on all Ruby versions less than 1.9.2
Specify pry-debugger in development only
Correct version specification
Specify pessimistic version constraint
Oops
Reorganize development and test dependencies
YARD fixes
Fix typo
Specify hard Yajl dependency
Remove json (using YAJL instead)
Require JSON on Ruby 1.8 only
This specifies the same dependencies as the default Gemfile (for now, at least)
This combination keeps failing for some reason