run_tests.sh: initial attemt at supporting ironpython.

fetches compiles mono and  ironpython. not tested much.
tweak the run_test docs
run_test.sh: download and compile mono works. ironpython does not compile though.
run_tests.sh: fix typo
remove .tests from .gitignore, add .data
PYVER now has both implementation and version info
minor
run_tests.sh: base name of the python executable should also be flexible
run_tests.sh: add support for jython.
ignore jython installations
hide distribute archives
run_tests.sh: make MONOVER configurable
run_tests.sh: simplify url generation
Merge remote-tracking branch 'arskom/master'
run_tests.sh: add MAKEOPTS as argument, doc update
improve error when an invalid type was passed to Array
add license header to util/django
fix typo in util/django
improve the message in the exception thrown when an invalid type is passed to Array()
Mark django support as experimental. #323