wq.db 1.1.4

wq.db 1.1.4 brings a couple of minor changes to restore backwards compatibility with older versions of 1.1.

• Restrict Django REST Framework to version 3.9 (see #77). Support for DRF 3.10 will be added in wq.db 1.2.
• Temporarily revert #62 and #69. These will be restored in wq.db 1.2.

Thanks @tomaszn and @MartinPontius for bringing attention to these issues.