font-awesome: Fix font-awesome 4.7.0 upgrade in a hacky way.
font-awesome: Fix font-awesome 4.7.0 upgrade in a hacky way.

What actually has been done below is to just copy the css class defination
from the latest font-awesome css to be here and since the rest of the stuff
in /third/fontawesome was updated in ee0b16b1efd41d190bbc40fef91d4d68a2cdfb85
we should be able to use this safely until we update all font-awesome class
usage in templates.

Fixes #4302.

SmartPeople/zulip,rht/zulip,jrowan/zulip,amanharitsh123/zulip,timabbott/zulip,SmartPeople/zulip,brainwane/zulip,j831/zulip,timabbott/zulip,brainwane/zulip,rishig/zulip,brockwhittaker/zulip,j831/zulip,hackerkid/zulip,dhcrzf/zulip,ryanbackman/zulip,brockwhittaker/zulip,zulip/zulip,j831/zulip,jphilipsen05/zulip,rishig/zulip,brockwhittaker/zulip,synicalsyntax/zulip,verma-varsha/zulip,rishig/zulip,jrowan/zulip,showell/zulip,rishig/zulip,punchagan/zulip,brockwhittaker/zulip,synicalsyntax/zulip,rishig/zulip,brainwane/zulip,Galexrt/zulip,zulip/zulip,ryanbackman/zulip,dhcrzf/zulip,verma-varsha/zulip,kou/zulip,mahim97/zulip,eeshangarg/zulip,showell/zulip,hackerkid/zulip,jackrzhang/zulip,dhcrzf/zulip,tommyip/zulip,shubhamdhama/zulip,ryanbackman/zulip,dhcrzf/zulip,andersk/zulip,hackerkid/zulip,timabbott/zulip,Galexrt/zulip,andersk/zulip,rht/zulip,jphilipsen05/zulip,tommyip/zulip,christi3k/zulip,shubhamdhama/zulip,hackerkid/zulip,mahim97/zulip,hackerkid/zulip,kou/zulip,andersk/zulip,shubhamdhama/zulip,eeshangarg/zulip,rht/zulip,hackerkid/zulip,synicalsyntax/zulip,eeshangarg/zulip,zulip/zulip,amanharitsh123/zulip,tommyip/zulip,mahim97/zulip,kou/zulip,jphilipsen05/zulip,rht/zulip,andersk/zulip,tommyip/zulip,vaidap/zulip,rht/zulip,mahim97/zulip,verma-varsha/zulip,andersk/zulip,zulip/zulip,kou/zulip,zulip/zulip,Galexrt/zulip,rishig/zulip,amanharitsh123/zulip,brainwane/zulip,showell/zulip,amanharitsh123/zulip,christi3k/zulip,zulip/zulip,amanharitsh123/zulip,SmartPeople/zulip,tommyip/zulip,rishig/zulip,hackerkid/zulip,punchagan/zulip,Galexrt/zulip,eeshangarg/zulip,shubhamdhama/zulip,SmartPeople/zulip,ryanbackman/zulip,tommyip/zulip,vaidap/zulip,Galexrt/zulip,vabs22/zulip,christi3k/zulip,brainwane/zulip,shubhamdhama/zulip,Galexrt/zulip,ryanbackman/zulip,vabs22/zulip,mahim97/zulip,jphilipsen05/zulip,tommyip/zulip,eeshangarg/zulip,verma-varsha/zulip,vabs22/zulip,jackrzhang/zulip,shubhamdhama/zulip,jackrzhang/zulip,rht/zulip,punchagan/zulip,vabs22/zulip,kou/zulip,j831/zulip,kou/zulip,jackrzhang/zulip,punchagan/zulip,synicalsyntax/zulip,showell/zulip,dhcrzf/zulip,punchagan/zulip,christi3k/zulip,shubhamdhama/zulip,verma-varsha/zulip,synicalsyntax/zulip,timabbott/zulip,ryanbackman/zulip,vaidap/zulip,timabbott/zulip,andersk/zulip,kou/zulip,vaidap/zulip,andersk/zulip,showell/zulip,timabbott/zulip,zulip/zulip,vaidap/zulip,vaidap/zulip,jrowan/zulip,j831/zulip,synicalsyntax/zulip,jackrzhang/zulip,jackrzhang/zulip,brainwane/zulip,verma-varsha/zulip,dhcrzf/zulip,jphilipsen05/zulip,brockwhittaker/zulip,jrowan/zulip,Galexrt/zulip,christi3k/zulip,rht/zulip,jphilipsen05/zulip,dhcrzf/zulip,brockwhittaker/zulip,jrowan/zulip,SmartPeople/zulip,timabbott/zulip,jackrzhang/zulip,jrowan/zulip,amanharitsh123/zulip,mahim97/zulip,eeshangarg/zulip,showell/zulip,brainwane/zulip,SmartPeople/zulip,punchagan/zulip,j831/zulip,vabs22/zulip,eeshangarg/zulip,synicalsyntax/zulip,vabs22/zulip,showell/zulip,christi3k/zulip,punchagan/zulip