v1.8.1

New changes in 1.8.1

Major changes are only language addition and bug fixes

• Added Language filter when creating a course/grade subject and on home page #65 @OlivierJM
• replaced the text input with the language select 0601b8a @OlivierJM .
• Added a language filter on home page 5647b77 @OlivierJM .
• fixed the sidenav conflict #73 (Bug) @BongoHive.
• Merge pull request #1 from BongoHive/fix-conf #68 (removal of unused config files) @BongoHive