Undefine COMPILER symbol
Adapt build flags for VC12 + debug build
Update file list.
libplatform stuff not needed on Windows
Fall back to arbitrary PATH_MAX upper bound
Undefine min/max macros
Use alloca for variable-size array on stack
eliminate left-over variable-size arrays
ignore run-tests.php helper files
commonjs_modules test requires json_encode.
object_dom test requires DomDocument class
Use directory seperator pattern %e
Don't force garbage collection on shutdown.

Doing so causes crashes on Windows and isn't needed anymore
anyways, since we have started tracking weak references
meanwhile.
Use concurrency::wait on Windows to sleep.

The chrono + sleep_for implementation seems not to work,
due to bugs in chrono header file.  And after all sleep_for
calculates a time_point for sleep_until, which calculates
the delta again and finally passes the number of
milliseconds to concurrency::wait ...
Slow down memory_limit test

Otherwise the test may execute so fast, that the
watchdog thread, ticking at 10ms currently, is too
slow to detect the memory limit situation.
Strip second timezone specification

v8 adds two timezone specifications to date strings.
However PHP fails to parse the second one, generated
on Windows systems.  Hence just strip away the redundant
specification and pass that one to PHP.
Skip tests/timezones on Windows
Add build instructions for Windows
Add pointer to README.Win32.md
Merge branch 'issue-123', closes #123, closes #24