Merge branch 'release/2.0.0' into develop
[BUGFIX] Handle AGI 5xx responses
[CS] Allow CI failure on JRuby

JRuby 1.7.3 is broken
[DOC] Fix gem description error

No more eventmachine, and hasn't been for…ever
[CS] Add a benchmark for the lexer run by Guard
Stop ignoring lexer.rb
Remove references to Ragel
Beginning of pure-Ruby lexer
Avoid recompiling regexes on each method invocation
Finish implementing most of the pure-Ruby parser

I still have one failing test left for causal events, but am deferring that while I test this branch with a few apps
Adding myself as an author
Failing test for "Results: Follows" event
Remove a bunch of dead code
Use local helper method
Attempt to test that the proper message was received
Handle Response: Follows messages
Fix handling of packets with more than one message
Ignore blank lines
Make sure to remove cr/lf on every message
Remove unused variable