Matt v2.0

@smlu
Read & Write transparent color idx from header
Add support for ABGR4444, 24 bit & 32 bit MAT image encodings
Set per monitor v2 DPI awareness

@bahstrike
+added checkbox to disable autoselect format from input file
+implemented batch convert
*probably fixed filehandle leak
+better rescaling support for program
*maybe fixed designer confusion about namespaces