Importing six.text_type instead of types.UnicodeType and
six.binary_type instead of types.StringType

io.FileIO is available in both Python 2 and 3, file is removed in
python 3.

* [minor] check if user exists or not

* [minor] remove the User Permission Link from module view

* Hide links in pdf

* Show footer in print preview

Unlike Python 2, Python 3 does not automatically unpack arguments
to lambdas passed as a tuple into named arguments.
Redefinining lamdas to accept separate arguments instead of a
tuple allows them to work in both Python 2 and 3.

StringIO and cStringIO modules are replaced with io.StringIO in
Python 3. six.StringIO is an alias for StringIO.StringIO in
Python 2 and io.StringIO in Python 3

* Email footer refactor

* styling fixes

* Unsubscribe message

* fix test

Python 3 (PEP 8) strictly disallows mixed use of tabs and spaces
for indentation
frappe innstalltion only throws error on frappe/utils/jinja.py as
of now but the rest are almost equally likely to fail, so changed
all of them in one commit

Fix typo

* [refactor] user permissions

* [fix] tests

* [ux] user-permissions

* [minor] cleanup system settings

* [minor] end progress

* [hotfix] Linked with and List item click

* Run a single test using Test Runner

* Add test for Linked With

* [minor] List view fixes

* [docs] to be rendered in website

* [docs] generating-docs.md

* [fix] codacy

* [docs] minor updates

* [fix] routing

* remove hardcoded height and width

* [graph] relative measures, offsets, generalise all base jobs

* Multiple datasets! (individually colored)

* [graph] Tooltips

* [graph] animate and change values

* [graph] percentage graph

* [graph] custom height, window resize refresh

* [graph] style changes

* [graph] update docs

* [graphs] make graphs.less

* [graphs] prefix classes with 'graph-', nest inside parent class

* first cut

* frappe.ui.CommentArea

* working commit

* enable airmode

* Styling fixes

* Add emoji support in comment

* editing wip

* Fixed editing area

* New message email

* Mentioned in a comment

* File backup email

* Feedback email

* Administrator logged in email

* Upcoming events email

* minor

* Add header title and indicator color

* [fix] callback for ajax

* [fix] ajaxSend instead of ajaxStart

* Updated Test for Query Report

* Correct path updated

* [hotfix] encode the email message to utf8 before sending mail

* [minor] review fixes