Markdown preview

[kirushik]

Closes #91

Opens previews in a modal popup window.
Works via javascript and AJAX.
Should be more or less covered by tests (and that coverage is easy to extend in case of bugs).

Currently only bound to Project description form field, but should be pretty easy to attach to other forms/fields as well.

[coveralls]

Coverage increased (+0.49%) to 78.86% when pulling dd72583 on kirushik:markdown_preview into 98d1b49 on SUSE:master.

[coveralls]

Coverage increased (+0.49%) to 78.86% when pulling 982bfc8 on kirushik:markdown_preview into 98d1b49 on SUSE:master.

[hennevogel]

Sorry this week was crazy for me. I don't like the interface very much, why don't you put it into a tab? Like in the comment field here. That would be great :-)

[kirushik]

@hennevogel OK, I can move that into tab. Will update this PR tommorow, then.

Are you OK with server-side rendering approach in general? I've chosen that over the clientside javascript rendering libraries, mostly because this way we can be as close as possible to the actual rendering outcome.

[kirushik]

I will reopen this PR when new interface will be ready.

[hennevogel]

@kirushik server side rendering is cool :-)

[kirushik]

@hennevogel OK, now there are tabs.

[coveralls]

Coverage increased (+0.5%) to 78.37% when pulling 4ef9149 on kirushik:markdown_preview into af11a92 on SUSE:master.

[coveralls]

Coverage increased (+0.5%) to 78.37% when pulling 4ef9149 on kirushik:markdown_preview into af11a92 on SUSE:master.