ColorCodes: treat "code" as semantic noise.

We want to allow the string "code" to be used in the triggering query,
but we want it to have no effect on how the query is understood
or processed.

Addresses issue #454.
BinaryLogic: Original version by @bpaschen
BinaryLogic:minor cleanup
Removing Xor, superceded by BinaryLogic
BinaryLogic: Harmonising the test format
BinaryLogic: Commenting out failing test until I can figure out why
BinaryLogic: Fixing order of presidence
BinaryLogic: Fixing layout with tests
BinaryLogic: Removing debugging info
BinaryLogic: Supporting Binary; thanks for the input @killerfish !
Merge pull request #612 from mwmiller/codewords

ColorCodes: treat "code" as semantic noise.
Merge pull request #615 from duckduckgo/mintsoft/binary_logic

Fixing up BinaryLogic