Minor improvements to Templating

* Will default to the UI language if lang_code is null
* Output format can be specified in constructor args.  Value is sticky.
* More logging.  Always identify template by printing the intended parameters.

Change-Id: I69d3f15cae566bfb454ab36be6fe2e4361d96e49
Merge "Minor improvements to Templating"
UI for importing checks

Change-Id: I5fd28fa12c3ca9f51d71ced6a05417ca1ca2d875
Merge "UI for importing checks"
Merge remote-tracking branch 'origin/master' into HEAD

* Minor improvements to Templating
* UI for importing checks