pidgin/pidgin

Refresh the README as a few things have moved and some of the wording was weird.

2021-03-19, Gary Kramlich
b09ca0df70cb
Refresh the README as a few things have moved and some of the wording was weird.

Testing Done:
Read it a few times.

Reviewed at https://reviews.imfreedom.org/r/568/
syntax: glob
.*.swp
.DS_Store
.flatpak-builder
*.pyc
*~
\#*\#
subprojects/*/
syntax: regexp
^build(.+)?\/
win32-install-dir(\.release)?
po\/pidgin\.pot$