Update adapter.php

Modified insertIfNotExist() to support NULL values
add unit test
Also update sqliteadapter
Fix use Sharing Api with calendar

Without this fix it logs this error:
Undefined index: itemSourceName at /opt/local/apache2/htdocs/oc7/core/ajax/share.php#44
I think the itemSourceName is only used with sharing files!
Remove special case for css in OC.filePath
CRON call ends in null exception


[error] 4461#0: *186285 FastCGI sent in stderr: "PHP message
: PHP Fatal error:  Call to a member function execute() on null in /var/www/ownc
loud/cron.php on line 125" while reading response header from upstream, client:
217.13.183.252, server: cloud.mycloud.com, request: "GET /cron.php HTTP/1.1", upstre
am: "fastcgi://unix:/var/run/php5-fpm.sock:", host: "cloud.mycloud.com", referrer: "
https://cloud.mycloud.com/"
Update cron.php
Allow specifying the item source in unshareFromSelf().
add utf8 folder test
improve logo flexibility to fix wide custom logo alignment, fix #9339
Adding type to favicon
Add unit tests for new unshareFromSelf() functionality.
Remove different URL for EE

This can now be achieved by setting `appstoreenabled` to `false` in config.php
add select2 to app specific thirdparty
replace chosen with select2 to provide ajaxified user and group selection for files_external, fixes #7499

remove minified select2 js

show avatars for users, simpler results

remove unneeded users and groups from settings template

fix css, escape user and group names
fix deletion of shares
no need to load user display names
add lookup route for displaynames
use displayname lookup route in files_external settings
Use AppFramework instead of custom controller