Initial work cleaning up op table
Move all unary operators to new schema
Move comp_op to the new table
Move and and or operators to the new table
Group arrow-like ops together
Move operator table clean up
Move ++, --, ** and // to new table
Finish operator table clean up
Update CHANGELOG after clean up on the operators table
by making it sane and clean in case we want to add
custom operators in the future.

The operator table with suggestions of extension points
(not yet implemented) can be found in the elixir_parser.yrl
file.

The only backwards incompatible change is the precedence
of the operators used by the Bitwise module.