moved, renamed, and consolidated various files

* added my Startup Weekend Spokane pitch to the README

* moved crop- and event-related views to their own respective
subdirectories
added SVG icons from The Noun Project
created logo
started writing Arduino code for the GoGrow
(nothing substantial)
built new user questionnaire

(the front end of it, anyway)
started writing React classes for users and crops
signed up for Google Analytics
started writing our sign-up page

(/i.e./, the landing page for new or unauthenticated users)
added left sidebar and analytics to index page
added site map template
miscellaneous edits to app file

* deactivated factories for the time being

* renamed crop- and event-related routes and their templates

* added sign-up route

* added controller templates

* opted for more descriptive variable names for Firebase refs