Adds new helper `content_settings_value`

This helper returns a value either from `content.settings` or from `options` hash.

What this brings?

You can now set essence view partial options in the `elements.yml` file:

```
- name: image
  contents:
  - name: image
    type: EssencePicture
    settings:
      image_size: '100x80'
```
Merge pull request #644 from magiclabs/feature/add_content_settings_value

Adds new helper `content_settings_value`
Deprecate take_me_for_preview and rename it to as_element_title

The content definition has an option to mark it as element preview title. The option was named take_me_for_preview. This now is named as_element_title.
Merge pull request #645 from magiclabs/feature/element_title

Deprecate take_me_for_preview and rename it to as_element_title
Allow latest versions of compass-rails and sass-rails

Fixes issues with apps using Rails 4.1 and compass image spriting
Using sass-rails 5.0.beta while building.
Adds a new rake task to import database dumps

These database dumps can be STDIN streams or from file.
Adds new capistrano task to export local data to remote

Like `cap alchemy:import[all,pictures,atachments,database]` you can now `cap alchemy:export[all,pictures,atachments,database]` to send local data to remote servers.
Escape the export db dump to be shell safe.
Merge pull request #649 from magiclabs/feature/export-database-to-remote

Feature/export database to remote
Merge pull request #648 from magiclabs/fix/sass-dependencies

Allow latest versions of compass-rails and sass-rails
Change the references to jquery ui to match new directory structure.

This adds the capability to be compatible for the jquery-ui-rails 5.0.0
gem.
Merge branch 'jquery-ui-rails_upgrade'
Fixes picture assignment in an element editor.

Since the editor partial is getting cached, we need to touch the content manually when assigning a picture. Otherwise it would just render the cached content which is the same as before.
Merge pull request #650 from magiclabs/fix/picture-assignment

Fixes picture assignment in an element editor.
Only link sites in dashboard widgets, if login_url is present.

Fixes #651
Merge pull request #652 from magiclabs/fix/dashboard-sites

Only link sites in dashboard widgets, if login_url is present.
Merge branch 'master' of https://github.com/magiclabs/alchemy_cms
Merge branch 'master' into tweaks