[loc] use a single rufus.loc as translator base

* Remove the need to maintain a new_translation.loc
* Add a sed invocation to remove comments and unwanted stuff
  to generate a final embedded.loc
* Note: sed is only invoked for MinGW.
  MS compilers still embed the unmodified rufus.loc.
* Also fix a small bug when parsing the version.
[loc] Add German translation

# Closes #195
[loc] Add Turkish translation

* Closes #218