Point class added + tests written to check the functionality

The Table class will build on this Point class and we will use the
table class for data storage.
The Table class is implemented and Bregman divergences added to the notes

The Table class implements various initializer and a file reader that
can read comma-separated-values and space-separated-values.

Some examples of Bregman divergences, along with their relevant
generating function and function domains, are added to the note.
Merge pull request #2 from rithram/master

Data utilities and relevant tests added