Remove deprecation for static access to engine
add getFirstEmptySlot, and getFirstUsedSlot to inventory.

Signed-off-by: Nick Minkler <sleaker@gmail.com>
Merge pull request #545 from Sleaker/master

Utility methods for Inventory
Added extra iterators for use with lighting and testcases
Make STANDARD_CHAT_PREFIX public
Fix color bleeding (SPOUT-242)
Added height map for lighting
Adding heightmap to parameter for lighting calculations
Merge pull request #546 from Snaipe/consolecolorfix

Fix color bleeding (SPOUT-242)
Corrected variable name misspell