A big update to menv. Here is a list of changes:

1) Added a README file which explains this system.
2) Added a menv_help command to view the README file.
3) Forced the shell to be bash for menv to work.
4) Added an menv_aliases array to cleanup just menv_aliases.
5) altered the fetch command to take a filename as a second arg.
6) Removed the trash on menv uninstall.
7) Reorganized aliases to make more sense.
8) Added a ni/nodeinfo function to print part of the motd with
   information about the system.
9) Added a di alias to delete imme... Its just quicker to type...
10) Added an alias to cleanup the Download folder.
11) Added some cool dpkg commands along with some git commands.
12) Added some networking aliases.
13) Redid the line count function so it can handle zero line counts.
14) Used mktemp for temp files.
15) Added a cool function rfc to cache and/or open rfcs.
16) Added a url diff function to diff the github of menv to make sure
    menv is up to date on bootup.
17) Added a testconnection function and used it in the motd to check if
    connectivity exists.
18) Added a menv_remote_install file to make it easier to install via a
    remote bash/curl execution.
19) Redid the statusline in my vimrc.