Added a sample environment js for tests
Added Variable processing for env vars on request.url
Tests in separate module
PR comments added
Appended test for var replace multiple times
separated tests and added missing var
s/getProcessedRequest/processRequestVariables
Added a new Options class as a mixin
Refactoring of find/replace code and recursive resolution added
Added headers for testing, refactored with request properties
Added variable environment replacement with multiple properties
Refactored findReplace to use string search replace
Added documentation for new _findReplace
Added a TODO
Merge pull request #14 from prakhar1989/master

Variable processing in action