move JediTyper into Tools directory as it's not in a state that would suggest making it a part of Cython

--HG--
rename : Cython/Compiler/Tests/TestJediTyper.py => Cython/Tests/TestJediTyper.py
rename : Cython/Compiler/JediTyper.py => Tools/jedi-typer.py

don't include buildtime in watermark

prevent compiler warning for missing virtual destructor

fix bug in nested C++ template syntax

split internal method calling helper functions into specialised 0-, 1-, 2- args versions to apply the method call optimisation to them

move increfs closer to the corresponding variable usages in C code (just in case it helps the C compiler to generate better code)

--HG--
extra : amend_source : 93bba856cb71e61c56335b3687337f5c68b62f2c

exclude types from method call optimisation again (thinko: we're dealing with the actual types here, not with their attributes)

exclude local Python classes from method call optimisation (even with metaclasses in place, they are fairly unlikely to return methods)