Added method ImageFromByte in TfpgBaseImgAnim. Now animation can be loaded from memory, not only from filename
Added Graeme suggestions
Much faster CopyRect() implementation for X11
Fixes a small spelling mistake in the .gitattributes file.
Merge remote-tracking branch 'dibo/fpgimganim' into develop

This adds the ability to read image data from a in-memmory byte array,
instead of always from a file. Thanks Dibo!
animation: removed the checking of filename in the HandlePaint event.

If we have a FImage instance, that should be good enough.
animation: added overloaded methods.

- Specifying the mask sample point is now optional for ImageFromByteArray
  If sample point is not specified, then (0,0) is used.
- Introduced an overloaded SetImageFilename() method what can take
  a sample mask point too.