bring back missing exception callstack display.
fixed uninitialized pro issue.
fixed overflow
model generator WIP
fixed test break.
Added timeoutms parameter in MemCache
Removed extra line
set default format for gridview to text

default format is text in short format so it should also be
like that in array() defintion.
Mentioning that timeoutms is available in memcache only.
Added failureCallback, reduced timeouts to 1s
cleanup MemCache timeout API after #804

use milliseconds only and fall back to seconds for older memcache
versions.
Merge pull request #805 from cebe/datacolumn-default-format

set default format for gridview to text
fix dataProvider getSort()

correct creation of new Sort object if none is there
Merge branch 'master' of github.com:yiisoft/yii2

* 'master' of github.com:yiisoft/yii2:
  set default format for gridview to text