use/install.rst: remove accidental $s

My Vimrc makes Vim show $ where line changes and I had accidentally
copy-pasted it to places where it doesn't belong.
Merge pull request #25 from Mkaysi/install

use/install.rst: remove accidental $s
translate.rst: use https:// instead of git://
Merge pull request #27 from Mkaysi/patch-1

translate.rst: use https:// instead of git://