Fixed bug regarding subimage and drawing of sprites.
Merge remote-tracking branch 'upstream/enigma-jdi' into enigma-jdi
Defines and implements EDL_ASTOperator,
which is an operator on the EDL abstract syntax tree.

The implementation has been tested and confirmed to work.
Removed superfluous part.
Merge pull request #48 from forthevin/enigma-jdi

Defines and implements EDL_ASTOperator