Initial work for supporting llvm based output and tests

[mitsuhiko]

This is work in progress. The idea is that we can support llvm tests and output behavior here. This is currently quite hacky to hobble along until we get something passing. I want to clean up the printing behavior later then separately to be easier to understand.

• [x] test ms-basic.test (currently one test has been removed because of a bug it shows)
• [x] operatorcast -> operator type
• [x] added support for qualifiers for variables (eg: class A const B)
• [x] added a few of those special missing dtors (atexit destructor etc.)
• [x] decide on what to do with )const vs ) const with default flags (changed default)
• [x] add all microsoft type names
• [x] moved all existing tests to test folder

This fixes #40

[mitsuhiko]

This changes the existing behavior with regards to space slightly. In particular )const now becomes ) const which I believe is a sensible default but I might change this back and make it configurable.

[mitsuhiko]

The bug in the last test is because in parse 1 to 5 are all handled as just read_var_type.

The actual mapping table for 0..5 is as follows:

Symbol	Behavior
0	Private Static
1	Protected Static
2	Public Static
3	Global
4	Function Local Static

This is then followed by a qualifier of which LLVM implements A, B, C, D and Q, R, S, T.

So this symbol:

?B@@3VA@@A

Has type 3 (global) with qualifier A (no qualifier).

This might need a new node.

[mitsuhiko]

Some of the llvm tests from ms-operators are broken. This needs a bit of deciding. The only ones that really concern me right now is the broken backrefs.

[mitsuhiko]

Decided to squash merge this. Should be easy to back out if absolutely needed.