mutt: Use OfflineIMAP and local Maildir

* When mutt starts, OfflineIMAP is run topull down fresh mail.
* Folders and what not have been updated to use the local folders.
* Some key bindings have changed as well.
* Iceweasel is the preferred browser, if it is installed.
bash: Add Java environment settings to use system look and feel
bash: Add mkpasswd function
bash: Add "pass for ..." subcommand to pass
bash: Fix mkvenv.python
i3: Prefer iceweasel over chrome
xsession: Write gpg-agent env file on startup
Xresources: I no longer remember why I did this