Changing data models (#226)

(copying fields that refer to votes, to refer to reviews).
Added script draft to be used in remote API

to migrate data for votes refactoring (#226).

Reacting to code review.
Reacting to code review (#226).
Some changes made while working with remote API

(copying fields values, #226)
Updating data accessing code:

Updating code to refer to review-related model fields instead of
vote-related ones. #226
Adjusting the code to pass pep8 checks.
Updating indexes, script for Activity

For all existing Activity entities replace 'voting' type with 'reviewing'

(#226)
Vote refactoring: adjusting method names and calls

(#226)
Votes refactoring: changes to frontend.

(#226)
Merge remote-tracking branch 'upstream/master'

into votes_refactoring

Conflicts:
	src/templates/Jeeqser.html
Reacting to code review for #226

pep8 stuff, whitespace changes only.
Refactoring - cleaning up remaining references

to votes (#226).
Reacting to pep8 warnings.

Mostly indentation changes, best viewed with whitespace changes ignored.
(#226)
Merge pull request #229 from egor83/votes_refactoring

Votes refactoring: renaming votes to reviews