oik-user v0.5.2

oik-user v0.5.2 fixes a problem when oik is not active. Tested with WordPress 4.5

Changes

• Fixed: Uncaught Error: Call to undefined function bw_get_user_field() when oik deactivated bobbingwide/oik-user#2
• Tested: With WordPress 4.5 and WordPress Multisite