Dramatically simplified the dot pattern definition: its only the initial x, the first row relative to the image center and the last row relative to the image center

Completely removed support for references and for reading dot data from DNGs
Fixed the issue with not properly handled spaces in directory names for the dot data dir
* removal data for new full time crop mode on eos m (just tested with 1344x652, maybe border limits have to be increased for larger resolutions)
* updated removal data for full time crop mode. should now work with all video resolutions. but won't work with silent dng, because of wrong meta data in silent dng
* horizontal dot calculation is now also center based
Merge pull request #2 from mixer2/DngFreeGrid

* Merged changes by mixer2:
  * New EOSM grid data
  * Center-based definition and calculation of x-coordinates for grid dots
Added javadoc and comments to the DotLocationDB and DotSet class
Added a function to write the destination DNG to an arbitrary location
Added a set of test pictures with reference conversion results plus some unit tests to compare the actual conversion result with the reference result.
Optimized unit test for conversion check: in case of failures, the resulting conversion files are not deleted.
Added test cases for the silent DNGs in movie mode and photo mode
Added a filter to only add DNG-files to the list of files for conversion