Make bool a proper subclass of int

Required a small amount of object changes, and then a large
number of replacements where we directly compared the class
to int_cls.  We now check that it's a subclass, since you
are allowed to use True/False anywhere that you could use
an int.  ex "xrange(0, n, step=True)"
Have to visit the tp_dict object if we create one.
Shore up sys.flags
dict.update and add _sysconfigdata
In CMake, copy the stdlib over if they get changed

My first stab at writing CMake rules
Copy the lib_pyston directory into cmake
Merge branch 'merge'
Turn off the 'dangling-thread' test since it's not reliable in CPython

And turn off that part of the fork.py test as well