move 'with' statement implementation back into WithTransform to fix 'with' statement usage for compiler directives

move 'with' statement implementation back into WithTransform to fix 'with' statement usage for compiler directives

--HG--
rename : tests/run/withstat.pyx => tests/run/withstat_py.py

--HG--
rename : tests/run/withstat.pyx => tests/run/withstat_py.py

Debugger: Recognition of module-level Cython code (initmodulename and PyInit_modulename)
Fix debug flag (import Parsing when needed)

Made the distutils extension 2.3 compatible
Renamed the --debug flag to --gdb and --pyrex-debug to --pyrex-gdb

Excludes buffers and C++, which have their own code.
This is in preparation for #591 (inline vs. cdivision) and
support for inline complex arithamtic.

python code stepping (for libpython and libcython)
generic stepper class
fix step-into functions
have cygdb accept a '--' command line argument to disable automatic importing
replace gdb.execute() with something that actually captures all output
have 'cy break' break properly on line numbers

(run: python runtests.py Cython.Tests.TestStringIOTree \
                         Cython.Debugger.Tests.TestLibCython \
                         Cython.Compiler.Tests.TestParseTreeTransforms)

--HG--
rename : Cython/Debugger/cygdb.py => Cython/Debugger/Cygdb.py

C function with context support
Preliminary stepping support
Source code listing
more stuff I forgot about

Write cython_debug to the actual build directory (distutils and the cython
                                                  command line tool)
List --debug flag in cython's usage

added the --pyrex-debug flag to Cython's build_ext
added the pyrex_debug boolean to Cython's Cython.Distutils.extension.Extension
    (for per-module debugging information)
debug output is written to the cython_debug directory
bin/cygdb is included (start this from the build directory)
    working commands: cy import, cy locals, cy break
when debugging is active, export all functions as extern

Now based on regex, as actually parsing the file was way to slow.