Fixed Travis-CI Build Status Link in README.md

because @pfalcon says so

Conflicts:
	.travis.yml

Check that the bare-arm, stmhal and unix-cpy ports at least remain compilable, even if we can only actually run tests against the unix port.

Update .travis.yml to use python3.3

Seems like I'd inadvertently created invalid YAML!

Add diffing of failure logs

Doh, the shebang line for run-tests itself relies on `python3`

This *might* fix it enough for all tests to run (maybe?)

Needs a proper fix, to install/configure CPython 3.3.x (or 3.4.0) on
Travis CI.

That was easy - just avoid erroring out on seeing candidate dir for namespace
package. That's far from being complete though - namespace packages should
support importing portions of package from different sys.path entries, here
we require first matching entry to contain all namespace package's portions.

And yet, that's a way to put parts of the same Python package into multiple
installable package - something we really need for *Micro*Python.

pip-micropython: revert $HOME back to ~

Don't allow both ENDIANNESSes to be set

Make pip-micropython more portable

Add Travis CI support.

Disabled by default.  Enabled in unix port.

Use computed goto instead of switching op-codes.

Fix parallel build.

Replace /tmp with a $TMPDIR variable
Replace multiple occurrences of /tmp/pip-micropy-venv with a $TMPVENV variable
Replace ~ with $HOME

See discussion on https://github.com/micropython/micropython/commit/2da81fa80c4cd965f05ad237d81d9764322fde20

Explicitly set `MP_ENDIANNESS_LITTLE` because that's the #define that is used in code elsewhere.