Change the question view’s background color to clear.

- So we see the app global color instead.

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>
Fix container navigation view controller being inited twice.

- `+new` == `+alloc` and `-init`.

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>
Fix question table view cells not having a white background.

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>
Disable auto layout for post body cell.

- Tried to fix the bug where we get conflicting auto layout constraints
when we move back to the questions tab and are displaying a specific
questions. This only moved the issue to another cell…

Signed-off-by: Aron Cedercrantz <aron@cedercrantz.se>
Merge branch 'master' of https://github.com/opfo/app into feature/signup-login

* 'master' of https://github.com/opfo/app:
  Disable auto layout for post body cell.
  Fix question table view cells not having a white background.
  Fix container navigation view controller being inited twice.
  Change the question view’s background color to clear.

Conflicts:
	Code Stream/OPFTabbedHomeViewController.m
Add custom view cells as xibs and their classes.
Design xib and add icons for activity types.
Add IBOutlets from xibs to view classes.
Add IBOulets' bindings to class models.
Add database loading and table view section titles.
Add cell loading and get model by indexPath.
Add cell selection handling and view loading.
Register nibs on table view for loading by nib.
Fix typo in xibs' file names and their identifiers.
Fix cell loading conditions to always return a cell.
Fix height of outer view containing text views.
Add opf_stringByStrippingHTML as NSString-category.
Add OPFStripAscii on OPF_escapeWithScheme's category.
Fix acitivity comment view cell's UITextView's height.
Revert to loading logged in user's feed, not hardcoded IDs.