wq.db 0.8.3

wq.db 0.8.3 brings a number of enhancements to facilitate updates to the Django REST Pandas and vera libraries.

• chart refactoring
  • Moved time series, scatter, and box plot generation from to Django REST Pandas (#47).
  • Moved identifier-based URL filters from to identify pattern (0add5ac)
  • The chart module is no longer needed and will be removed in wq.db 1.0
• Fix bug in search view
• Numerous improvements to the internal implementation of patterns and natural keys.