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Merge pull request #28 from rrrene/patch-1

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Added inch gem as a development dependency.
Released v0.5.0
Initial implementation of Delay.
Fixed obligation specs broken when creating Delay class.
Created MRI and JRuby specific implementations of FixedThreadPool

* Added (untested) Concurrent::Processor_count function
* Memoized processor_count
* Created shared specs for fixed thread pools.
* Renamed FixedThreadPool to RubyFixedThreadPool
* FixedThreadPool now cast as platform-specific implementation.
* JavaFixedThreadPool now passing all specs.
* All specs passing for all fixed thread pool implementations.
Merge pull request #31 from jdantonio/fixed_thread_pool

Created MRI and JRuby specific implementations of FixedThreadPool
Made pending a spec I broke while working on PR #31
Created MRI and JRuby specific implementations of CachedThreadPool

* Created new RubyCachedThreadPool class and associated files.
* CachedThreadPool and JavaCachedThreadPool both map to RubyCachedThreadPool.
* Fixed thread pool spec that worked for fixed pools but not cached pools.
* Updated RubyCachedThreadPool constructor to be more like RubyFixedThreadPool.
* Finished JRuby optimized CachedThreadPool.
Merge pull request #32 from jdantonio/cached_thread_pool

Created MRI and JRuby specific implementations of CachedThreadPool
Better cleanup of thread pool tests.
Added randomizer back to RSpec tests (unintentionally left it commented-out after debugging).
Removed gc hack from spec helper--it didn't fix the problem.
Updated all tests not about thread pools to use NullThreadPool as global/class thread pool.
Fixed Agent test broken when updated to use NullThreadPool.
Updated processor count functions.
Removed deprecated Agent stress test.
Coveralls only runs under JRuby on Travis.
Reset coveralls for all platforms.