Add support and tests for <> operator

It's referenced in the docs, but missing from the library
Merge pull request #5 from incredible-labs/support_nequal_op

Add support and tests for <> operator
Add tests for count & groupBy, and fix groupBy
Add another group by test
Merge pull request #7 from incredible-labs/test_groupby

Add tests for count & groupBy, and fix groupBy
fixing case sensitivity, minor spacing fix
adding ability to specify engine, collation, charset on createTable
docs fixup, adding  modifier on createTable
0.1.2
Merge branch 'master' into gh-pages

* master:
  0.1.2
  docs fixup, adding  modifier on createTable
  adding ability to specify engine, collation, charset on createTable
  fixing case sensitivity, minor spacing fix
  Add another group by test
  Add tests for count & groupBy, and fix groupBy
  Add support and tests for <> operator