Merge pull request #14 from yelinkyaw/master

Additional known fonts for Myanmar
masterpiece uni sans is under an SIL free license
Sangam has no coverage in Myanmar Extended-A block
doc/comment
coverage counts Myanmar, Myanmar Extended-A
whitespace
tharlon and yunghkio also cover block tai le
doc/comment
tai le coverage
FreeSerif also covers Tai Le
amended order from @yelinkyaw in #14 discussion
re Myanmar block
spelling error