HQLPARSER-5 Adding support for BETWEEN predicates
HQLPARSER-5 Removing some warnings
HQLPARSER-5 Stripping out quotes from character literals for ease of use
HQLPARSER-6 Extracting separate module for Lucene tree walker
HQLPARSER-6 Moving custom tree walker logic from parser sub-class into delegate
HQLPARSER-6 Establishing QueryParser API, allowing clients to parse queries without having to deal with Antlr types
HQLPARSER-7 Adding CheckStyle plug-in, using configuration from OGM
HQLPARSER-7 Fixing CheckStyle issues
Misc build improvements:

* Specifying all plug-in versions
* Don't import types from transitive dependencies
* Making sure only Java 6 APIs are used