[Meera] Renamed glyphs to meaningful names

Most of the vowels and vowel signs were having the default names
like uni0D4E. Renamed them to meaningful names.
[Meera] Provide correct names and lookup rules to glyphs with Nameme.xxxxx naming

Signed-off-by: Rajeesh K Nambiar <rajeeshknambiar@gmail.com>
[AnjaliOldLipi] Renamed glyphs to meaningful names

Vowels, vowel signs and malayalam numerals were having default names. Renamed them to meaningful names.