improving (??) the management of ARBG and BGRA in JmeContainer :
- use Format.ARGB8 or Format.BGRA8 if supported by JME (eg: 3.1)
- if format is not supported (3.0.10) then the reorder of data is done into the JavaxFX Thread. (Thanks Arthur)
Merge pull request #25 from davidB/master

improving (??) the management of ARBG and BGRA in JmeContainer :