Avoid incrementing an rvalue

add logo

fix documentation generation

fix mixin-type variable declarations, fix #496

fix tokens slices for some special parse methods

fixes FunctionCallExpression to include its type,
FunctionDeclaration to include its type,
IndexExpression to include its unary expression,
fish operators, etc are fixed

make tester in coverage mode always succeed

make opEquals generator easier to understand

also test it

more coverage, fix range error in q"str

add missing token ranges

add backwards compatibility aliases (#478)