- regexp engines are different from 1.8 to 1.9, fixed the literal shorthand regexp accordingly
- changed the shorthand regexp text from a match to a string scan
- test_helper now loads rubygems unless RUBY_VERSION is > 1.9
- added test that asserts nonexistent filters are ignored
- Bill's mind blowing liquid patch to support filter separators (|) in quoted strings (svn r7516).
- This is a consolidation effort based on newrelic's liquid fork commit 88a5b89