[#612] Changed project to custom auth
[#612] Replaced User model with get_user_model()
Merge pull request #633 from akvo/hotfix/612_tastypie_auth

[#612] Hotfix for Tastypie auth
[#635] Changed image url for Facebook share button
Merge pull request #636 from akvo/hotfix/635_fb_share_button

[#635] Changed image url for Facebook share button
[#635] Corrected location of FB share button
Merge pull request #637 from akvo/hotfix/635_fb_share_button

[#635] Corrected location of FB share button
[#612] Replace User with get_user_model() in yet another place
[#612] Add missing ()
Merge pull request #638 from akvo/hotfix/612_tastypie_auth

[#612] Replace User with get_user_model() in yet another place
[#612] Switch to vanilla Tastypie

Change back to using django-tastypie==0.11.1 since our local fixes were
for running Django 1.7.
Merge pull request #639 from akvo/hotfix/612_tastypie_auth

[#612] Switch to vanilla Tastypie
Looks good to me (reviewed)
Merge branch 'release/candidate' of https://github.com/akvo/akvo-rsr for 2.3.8 release (Xylocarp)
Merge pull request #642 from akvo/master

[#612] merge 2.3.8 changes back into develop