Just a simple upgrade to littleproxy-1.0beta4

Just keeping the API compatible at the moemnt. It looks like the betamax
filters modify the object inline, so returning the object after the
modifications should make it work.
Created a failing test

So it fails playback when doing things concurrently using the
AsyncHttpClient from Apache Http Components.

This is similar to the behavior I found when I ran the proxy standalone.
Of note is that it doesn't seem to fail if the tape is READ_WRITE. Will
have to add a test to demonstrate that as well, then refactor all the
duplicated code out.
Modified the test to do both tape modes

Now it's a bit more configurable, and no repeat code. yay
Adding deadlocked thread count
Seems I probably made a mistake here. That error message is wrong
Merge pull request #127 from dkowis/updated_littleproxy

Just a simple upgrade to littleproxy-1.0beta4
a small change or two to the BetamaxFilters

Mostly a TODO note with regards to how to handle the CONNECT part.

And then using a ProxyUtils method that was mentioned in the
littleproxy javadocs instead of doing the same check ourselves. It reads
a bit nicer.
Updating the concurrency tests to prove they work
Merge pull request #129 from dkowis/concurrency_tests

Concurrency tests