Update to mediaelementplayer.css and mediaelementplayer.min.css

Moved .mejs-clear to above Layers
Removed redundant background property in .mejs-container .mejs-controls
Removed redundant background property in .mejs-container .mejs-controls
div
Remove Redundant padding property in .mejs-container .mejs-controls
.mejs-time
Moved width propery for consistency in .mejs-controls .mejs-time-rail
.mejs-time-current
Cleaned up the format in mediaelementplayer.css for consistancy
Updated mediaelementplayer.min.css with the changes