Fixed small typos and CSS issues

Typo was untitiled to untitled

CSS private repo icon no longer hidden when you mouse over it.
Dropdown to choose type of file gfm/markdown/html
Allow other plugins to support different filetypes
Cleaned up Dropbox to allow new editor file types

Filters and receives correct files extensions.
Changed file type checkers to support different types

Stopped using `profile.editor.regExp` because regular expressions didn't
seem to save too well in local storage.

Moved the original file type check function into a higher scope.

By default the editor uses GFM, and has 3 file types. Because HTML has 2
file types, whenever you switch over to HTML then refresh the page,
jQuery will 'merge' the two arrays together (via $.extend) and instead
return ['.html', '.htm', '.mdown'] rather than just ['.html', '.htm']
Support views generated by pure HTML
Increment version in package.json
Switching to HTML context now requires toggling

Enabling HTML editing now requires you to toggle it in the Preferences
pane.
Set sanitize to true in marked
Remove lodash, unused module
Merge pull request #194 from swang/remove_lodash

Remove lodash, unused module
resolved merge conflicts
Move editor dropdown into top navbar
Add unique id for reset profile in preferences
Merge pull request #196 from swang/move_editor_selector

Move editor dropdown into top navbar
Use local version of jQuery when in dev env

Allows people to edit/use local version of dillinger while not connected to
internet.
Highlight markdown blocks based on lang specified

This changes the logic so that the markdown block is highlighted when
there is actually a language prefix in the markdown block.

This will highlight in javascript:
```js
  console.log("sup?)
```

This will not highlight at all:
```
  Not Much
```
Merge pull request #204 from swang/highlight_based_on_lang

Highlight based on lang
Added export with style feature, which allows for optional syntax highlighting in exported HTML files
Merge pull request #209 from kkleidal/master

Export HTML with Style