Toast enhancements

- Allow position of toast (and other messages) to be center, top, or
bottom
- Allow change of HUD text color
Added the XHUD stuff for @gerryhigh
Merge pull request #18 from danmiser/master

Toast enhancements
Added an overload for ShowToast to match the old boolean one - @danmiser
Toast demo changes
MultiLine Toast and TextAlignment

- Allow overriding TextAlignment for Toast
- Better support and positioning for multi-line toast
upstream merge
Merge pull request #19 from danmiser/master

MultiLine Toast and TextAlignment
Merged in changes from @gerryhigh - with a few modifications
merge from bigted