Merge pull request #278 from nanan9177/blockly_fix

Small fix on image rotation.
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Blockly-core drop with IE/surface fixes.
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Blockly core hotfix.
Updated levels with chompers so that they can be reached easily.
Merge branch 'master' into tutorial
Merge pull request #279 from nanan9177/tutorial

Chomper position changes
Updated Karel 3 Level 6 to accept the two if solution.
Merge pull request #280 from nanan9177/tutorial

Updated Karel 3 Level 6 to accept the two if solution.
release 0.0.56
Updated levels to have chompers further away>