Adding bootstrap-markdown editor

Add 'no posts yet' message to empty streams

Add role='alert' to alerts

Disable animations in poltergeist

Bump poltergeist

Fix up the meaning of the name parameter in mention

Fix command in changelog

The desktop frontend now treats the "name" parameter of mention as
a string to display unconditionally. But the Diaspora::Mentionable
renders mentions the different way: "name" is treated as a fallback
string which is rendered only if the person's name is unavailable.
This reflects on the mobile version ATM. This patch makes it behave
the same way as the current desktop version does.

Upgrade devise to 4.2

Remove inline notifications javascript

Fix settings page after submit

Fixed:
* wrong url
* broken navigation
* broken design
after saving the user settings

Fixes #5847

only expose routes from devise that we actually use

Fix mentioning model being broken when reopening it

Contacts page fixes