CSS/HTML consistency, image scaling and word breaking

Implements image scaling, word breaking and fixes several CSS/HTML
inconsistencies
jQuery, Impromptu and Validator updates

Also removed unneeded file.
Impromptu, jGrowl updates
Select2 update
jQuery Modal update
CodeMirror update
jQuery UI update
Adds AJAX to Security questions #894
Implements #430 Moderation Notifications
Intruducing https://github.com/mybb/mybb/issues/197

Warnings when users try to change settings which often cause problems.
Also a JS password comparison.
Merge pull request #963 from Destroy666x/instsett

Introducing https://github.com/mybb/mybb/issues/197
Feature #439 & #430
Feature #439 Moderate Groups
Please work...

Thanks.
Moved img SCEditor scaling to every theme...

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2 themes more...

And 2 unfixed template bumps which I mentioned in other issues...
Merge pull request #965 from Destroy666x/CSS

Another PR for #816
Add missing smilies https://github.com/mybb/mybb/issues/908

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Fixes #967 Username Availability and CAPTCHA Validation Problems

#967
Merge pull request #968 from PirataNervo/featurefix-967

Fixes #967 Username Availability and CAPTCHA Validation Problems