c3fmt for 0.7.7

[ccll]

Features:

• passes all tests (with some tests modified to the new syntax and a few new tests added)
• new generic syntax List{int}, this one brings most of the trouble, as "{}" are used for struct blocks, code blocks, struct initializers etc, may fail on some edge cases
• optional type changes from ! to ?, including docs @return! to @return?
• keyword changes: def-> alias, distinct -> typedef, fault -> faultdef, anyfault -> fault
• format for the new faultdef syntax
• new compound literal syntax: Foo { 1, 2 } -> (Foo) { 1, 2 }

Other things are not touched, such as deprecation of {| |} block, $or $and -> ||| &&&, etc.

I tried to keep the commit history more atomic and cleaner for reviewing, but failed, the history is full of experiments and trial and errors, finally I squashed them into two commits, hope this would not be a trouble.

[ccll]

Found one edge case, please don't merge this yet.