Removed insertion of http referer and replaced it with placeholer dynamic

Due to the fact, that the http referer does only represent the host of
the client which is sending the creation request, the sources array
will be filled with unecessary information.
Added test to include use of translate in an object property reference
Added check to skip creation of master translation when a translation already has been created from a file
Removed sample text which has been used for development
Fixed little bug
Added support to parse inverse-statements in handlebars files
Removed definition of 'dynamic' placeholer in sources array