Updated the build to call the correct script file (was hard-coded to version 2.1).
Merge branch 'develop' of https://github.com/dajester2013/CFArango.git into develop
Fixes #17

Added method executeUpdate() to handle DML queries.  Since these queries
do not appear to support return values, this method will return true for
a successful execution or throw an exception when an error is
encountered.

Also added helper methods:
- validate() performs server-side syntax validation
- explain() retrieves the query plan from the server