Add hitlist_api

hitlist api includes authenticated eatery_notes_get method
Working notes modal popup

Notes modal uses hitlist api
Move memcache helper functions

Moved memchace helper functions to its own module to import in both the
enpoints.py and main.py. Commit also includes fix for newly created
eatery and new trip bug
Add memcache query to hitlist_api
Change search attribute selection

Removed combobox and replaced with regular select dropdown for better
performance on mobile