LB-777: Make the selection of embed theme mandatory

Fixed.
LB-605: Internal Error 500 happens when collaborator tries to delete image from Media Archive
LB-729: Pinterest share error

A more substantial fix
LB-729: Pinterest share error

small fix
LB-751: Theme structure refactoring - use base theme

partial refator, just for diff.
LB-751: Theme structure refactoring - use base theme

Gizmo fixed.
Merge pull request #222 from vladnicoara/pinterest-error

LB-729: Pinterest error
Merge pull request #221 from eozan/LB-777

LB-777: Make the selection of embed theme mandatory
LB-784: Update Facebook source

Starting to take shape
LB-716 : Put Reopen/Close -> backend (REST part)
Merge remote-tracking branch 'sourcefabric/devel' into liveblog-15
LB-785: Typo under "Manage collaborators": Collaborators managment

Fixed.
LB-792 : "Pin time so you won" appears when mouseover over "Pin"

Fixed
LB-681 : Editor role
Merge pull request #224 from nidzix/lb-792-pin-text

LB-792 : "Pin time so you won" appears when mouseover over "Pin"
Merge pull request #223 from eozan/LB-785

LB-785: Typo under "Manage collaborators": Collaborators managment
LB-784: Update Facebook source

Done
LB-784: Update Facebook source

Pagination fix for comments
LB-799: Config blog - user switch can't be changed from off position:

Fixed.
LB-751: Theme structure refactoring - use base theme

base theme added.
default theme extends base.