Added test cases for textManipulation helper functions
Added optional $exit param to redirect() for testability and better default $statusCode handling
Removed 201, 304, and 305 as valid statusCodes for http::redirect() (not applicable in the given context)
Merge branch 'master' of github.com:wvulibraries/engineAPI
New tests for http helper class. Also added ob_start to bootstrap to fix 'headers already sent' errors