* Fix build.js

* let to var

* Added use_strict flag

* Add new build system requirements

* Fix array includes

* Fix indexof

* prefix removal

* cleanup console.log

* update search_utils

* another fix

* email_parse address fix

* travis check for email-parseaddr

* email parseaddr fix

* fixes

* Added test case

* minor change

* Added few email_ids

* condition change

* Mobile no based login.

Added Mobile No field to User doctype, unique.
Added check for searching user by mobile no in authenticate method in auth.py
Changed placeholder Email address to Email address or Mobile number in login.html

* Mobile no login option in System Settings

* Modified By to Administrator

* Update login.html