Optimize pictures with optipng.
Optimize svgs with scour.
Add shellscript for optimization.
Improve IE Compatibility

Added meta tags from HTML5 Boiler Plate to improve compatibility with IE7+. This fixes the issues with rendering.
Don't set Content-Length header if size is unknown
fix first time encryption after app was enabled
The "lost password" field depends on OC_USER_BACKEND_SET_PASSWORD

so it should only be visible for users with a supporting backend.
added OC_DB::isError and logging
fixed error rising from fetchRow
improved test
- fixed testPermanentDeleteFile sometimes failed
- speed optimization
- reformat code
added users for tests
reformat code to meet coding guidelines
[tx-robot] updated from transifex
added check by numRows()
changed to public api where it was possible
reformat code to comply with the coding guidelines
Merge branch 'master' into file_encryption_tests
Merge pull request #3496 from owncloud/file_encryption_tests

improved tests for files_encryption
Merge pull request #3481 from owncloud/firsttime_enc

fix first time encryption after app was enabled
Merge branch 'master' into file_encryption_util_is_error

Conflicts:
	apps/files_encryption/lib/util.php
fix https://github.com/owncloud/core/issues/3320
remove unused varaibles
fix tests, after unused variables are removed