Column names case insensitivity and quotes

[tabdulradi]

According to http://docs.datastax.com/en/cql/3.3/cql/cql_reference/ucase-lcase_r.html

Troy's CQL Parser should

• support double quoted identifiers (especially column names in select clause and create table)
• lower case identifiers, unless they are double quoted.

[tabdulradi]

Specs added (but ignored) here #129