Skeletal test case class for TamilNoun module
completed test cases for TamilNoun's get_class() method using excel file
list of nouns, with class numbers and direct objects (for test cases)
Fixed __getitem()__, __setitem()__ and __delitem()__. TamilWord object
can now be indexed as if it were a unicode string.
Should be subscripting the instance, not the class
Fixed mix up between classes 7 and 8
wrote test cases for split_letters method
added additional column for expected values of split_letters method
Merge pull request #8 from merlinexavier/master

Added new test cases and fixed bugs in TamilWord and TamilNoun