[FEATURE] LLL file kickstarting - old language XML format
[FEATURE] Rewriting and kickstarting of XLF format LLL files

Fixes: #171
[TASK] Skip LLL rewriting for Column and Row components to avoid mess
[BUGFIX] Check type of assumed fields before attempting to set default value
[TASK] Fix - strike that, remove - failing test for write protected LLL file
[TASK] Minor improvements and cleanups in messages sent
[TASK] Automate a few key assignments when possible
[BUGFIX] Correct TCA array structure in test case
[TASK] Add fallback usage of Flux extensionName and form ID
[TASK] Adjust tests
Merge pull request #286 from NamelessCoder/languagerewrite

[FEATURE] LLL file kickstarting and XLF support