Squashed 'ka-lite/' changes from a083779..dd68dee

dd68dee Merge pull request #1769 from bcipolli/import-refactoring
add69a4 Removing paths that allowed non-prefixed kalite imports to work.
d715aec Adding kalite prefix to all updates imports, using relative imports for internal imports and url confs.
7a122f7 Adding kalite prefix to all testing imports, using relative imports for internal imports and url confs.
a063b4b Adding kalite prefix to all shared imports
d43ba76 Adding kalite prefix to all main imports, using relative imports for internal imports and url confs.
3c7b40b Adding kalite prefix to all khanload imports, using relative imports for internal imports and url confs.
33b0e6d Adding kalite prefix to all i18n imports, using relative imports for internal imports and url confs.
fd6a47f Adding kalite prefix to all facility imports, using relative imports for internal imports and url confs.
e849d08 Adding kalite prefix to all distributed imports, using relative imports for internal imports and url confs.
92b9cd2 Making coachreports url confs use relative imports (#1767)
abc0555 Adding kalite prefix to all control_panel imports and url confs.
0e97d98 Adding kalite prefix to all coachreport imports and url confs.
1d971e1 Addding back control panel images; deleted during static refactoring.
80ab19f Merge pull request #1744 from bcipolli/1742
2499479 Cleanup for #1742: remove central-only code.
03edc52 Fix for #1742 - assume that dubbed video map contains all supported language codes directly.
3421213 Merge pull request #1738 from bcipolli/1590
09db4f5 Add message after deleting language pack.
31e325d Rename variables, communicate about actual deletions.
932a111 Don't reset lang parameter if it's already set.
09509f4 Change variable names, allow success API to communicate messages.
9d2d0bd Rename variables to project standard.
0e22d26 Force override of KHAN_EXERCISES_DIRPATH to point to STATIC_ROOT.
1905193 Merge pull request #1723 from anuragkanungo/issue1422-local
76d79bd Setting develop central server from globe to adhoc.
81ec123 fix syntax error
893a82a Fixing js bug, cleaning up html
58156ba Potential fix for #1758: make sure that gettext (and other functions/variables) are always defined.
ba30836 Solving #1590
ea16f9d fix some invalid template tags
351bb24  Updated HTML file white spaces
7500c3b  Updated Style of css
c683c4d  Tests updated but need modification, commit just to get guidance
cd411b9 Merge branch 'develop' of https://github.com/learningequality/ka-lite into issue1422-local
d79c2ee  Delete Subtitle Functionality for English Button and Test Cases moved to i18n
e9f8255 Bug in i18n data migration file; needed fix for tests.
366cffa Adding testing app, so that testing can run, and dummy models.py file.
c7b46b9 Fixing testing settings to remove unnecessary global dependency.
10b0b93 Removing deleted testing decorator from updates.
9520dd2 Removing deleted testing decorator from main.
a0abd93 Removing deleted testing decorator from facility.
a0c9f77 Removing deleted testing decorator from distributed.
ff81894 Removing deleted testing decorator from coachreports.
dc2ffb9 Removing internationalized exercises from the repo.  Boo.
db74c2a Merge branch 'issue1422-local' of https://github.com/anuragkanungo/ka-lite into issue1422-local
42f00ef  Refresh functions moved inside
de03566 Merge remote-tracking branch 'upstream/develop' into issue1422-local
8ed0385 Conlict Resolve Merge remote-tracking branch 'upstream/develop' into issue1422-local
d65ebe5  little more update in error-handling
74fd0db  little more update in error handling
6f43c5e  Updated Error Handling in api_views.py
47cfa66  Cleared the webcache on Delete and also made suggested modifications
60abbd9 Conflicts Resolving Merge remote-tracking branch 'upstream/develop' into issue1422-local
0eae412  Resolved Merge Conflict
ce39ded Merge remote-tracking branch 'upstream/develop' into issue1422-local
807ced0  Issue 1422 Delete Language Button
d3328fc  Issue 1422 Delete language button
726a094  Issue 1422 Delete language button

git-subtree-dir: ka-lite
git-subtree-split: dd68deeaa555e8628454141c4f2bb5a0a35e1d67
Merge commit '53eb42c301762ec92956d1e068a1983c1c311e39' into develop
Adding centralserver prefix to all central imports, using relative imports for internal imports and url confs.
Adding centralserver prefix to all contact imports, using relative imports for internal imports and url confs.
Adding centralserver prefix to all faq imports, using relative imports for internal imports and url confs.
Adding centralserver prefix to all i18n_central imports, using relative imports for internal imports and url confs.
Adding centralserver prefix to all khanload_central imports, using relative imports for internal imports and url confs.
Adding centralserver prefix to all registration imports, using relative imports for internal imports and url confs.
Adding centralserver prefix to all stats imports, using relative imports for internal imports and url confs.
Fixing missing include of stats.urls
Moving khanload_central to khanload
Adjusting central installed_apps and other settings to centralserver prefix
Changing central use of khanload_central to khanload.
Renaming i18n_central app to centralserver.i18n
Renaming i18n_central refs inside central app to centralserver.i18n
Renaming i18n_central refs inside central app to relative refs.
Renaming i18n_central refs inside stats app to centralserver.i18n
Doing the CORRECT khanload move.
Removing unnecessary paths from manage.py and wsgi
Removing incorrect settings import that broke the build.