Feature/operators: Adding support for collection operators.

- Traded ```scala.collection.mutable.parallel.ParHashSet``` for ```scala.collection.mutable.ArrayBuffer with SynchronizedBuffer``` in ```com.newzly.phantom.CassandraTable``` to preserve the order of columns in schema generation.
- Added support for filtered queries: ```SELECT (a, b) FROM tableName WHERE id = id ALLOW FILTERING;```
- Added a CQL ```LIMIT``` in all ```one()``` queries.
- Added support for ```list<type> prepend, prependAll, append, appendAll, remove and removeAll```
- Added support for ```set<type> add, addAll, remove and removeAll```
- Added support for ```map<key, val> put, putAll```