Convert README to Markdown.
Add Travis CI build status badge to README.
#2040 - Deactivate modules that no longer exist.
- added module::deactivate_missing_modules()
- revised module::deactivate() to change log message if the module is missing
- added call to new function in module::get_obsolete_modules_message()
- added call to new function when loading admin/maintenance menu
Merge pull request #189 from jozefs/markdown

Convert README to Markdown and show build status badge
Merge pull request #190 from shadlaws/fix_2040

#2040 - Deactivate modules that no longer exist.
Remove stray line of debug output.
Follow-on to 384bc7afc86be706bf61def09afc8306cdad2443 for #2033
Update golden file for XSS test.
Test against 5.2.3, our minimum version.
Also test against 5.3, 5.4 and 5.5 to be forward looking
Travis doesn't have PHP 5.2.3.  Test against 5.3 / 5.4 / 5.5.
Follow-on for #2043.  Fix some tests that made bad assumptions about
the state of the world.  These were uncovered when we ran the tests on
Travis which runs the tests in a different order than what I (and
apparently others) use on their dev boxes.
Automated update of .build_number to 376 for branch master
Last update: 0d05e91cd3c5050c25133c864f8b789f499d8e17 (16 commits ago)
Explicitly print out the exit status to see if I can narrow down failures on Travis.
Automated update of .build_number to 377 for branch master
Last update: 121fee8c4e8ee88017df017eaf0638cde2dd8ec5 (1 commits ago)
[ci skip]
Revert "Return "1" to CLI if not all unit tests pass.".  We're not successfully
passing back $all_passed because the function doesn't take it by reference.  Which
is my fault because I gave Jozefs bad advice.  But I don't think it's necessary anyway
so I'm going to try a different approach.

This reverts commit 4fe07c6b0a341b0b99ee1b051f7c0bdfda572e04.

Conflicts:
	modules/gallery_unit_test/controllers/gallery_unit_test.php
Set exit status to the number of failed tests.  This should fix issues with Travis.
Merge branch 'master' of github.com:gallery/gallery3
Automated update of .build_number to 378 for branch master
Last update: 121fee8c4e8ee88017df017eaf0638cde2dd8ec5 (4 commits ago)
[ci skip]
Follow-on fix: count errors as well as test failures.
Automated update of .build_number to 379 for branch master
Last update: 97a156d530b22d190f2c227105fd279a049ac76d (1 commits ago)
[ci skip]
Only build 3.0.x, 3.1.x and master branches