Optimise any(genexpr) and all(genexp)

[scoder]

In the special case of all() and any(), generator expressions can be implemented as inlined loops. So the following would run without needing to instantiate a generator function:

all(i for i in range(1,20)
any(x for L in [[0,0], [0,1]] for x in L)

[scoder]

Implemented here:

 http://hg.cython.org/cython-closures/rev/1cbd9345c4e1

The current scoping rules are those of Py2 list comprehensions. This needs fixing as soon as proper generator expression scopes are in place. See ticket #465.

[scoder]

Broken in 0.15, needs reimplementation.