Allow key/value contenttype references in select fields.

Specify contenttype/key,name instead of just contenttype/value.

Bolt uses the first item internally, while the name is displayed in the
drop-down field.
Added contenttype-based select field to kitchensinks
PHP sux: Empty argument never be overriden with "" default parameter, so 'new Cache()' won't initializes with correct BOLT_CACHE_DIR
Merge pull request #1099 from rixbeck/master-org

PHP sux: Empty argument never be overriden with "" default parameter, so...
Added "select all" and "select none" options to multiselect. Fixes #1098.
Added "select all" and "select none" options to category-select. See #1098
Fix a bunch of minor issues related to files and filetypes. Fixes #1062.
Add asynchronous social media library based on Socialite
https://github.com/tmort/Socialite

The over all effect is faster intial pages loads as buttons and widgets
rendered are done in JS after page load has finished and the user
scrolls to the area of the page.

Code has been baking for a month in my staging environment and passes
Google PageSpeed test nicely!
Merge pull request #1104 from GawainLynch/feature/Socilaite

Add asynchronous social media extension based on Socialite
Make sure old settings for 'accept_file_types' are not still picked up.
removed unneeded line.
Whitespace only
Refactored getToken / checkToken out of lib.php.
Bumping version number to 1.6.0 dev
Make sure the cached config is invalidated whenever the version number changes.
Only show the 'DB needs repair!' notice when logged on. Fixes #1046. Fixes #1060.
Missed a 'getToken' in 141338adb.
Make more use of \Request object, more consistent, typo's.
Don't display the 'allowed filetypes' on the Stack. Visual clutter must go.