Some issues with URLs (broken links and wrong pages), formatting
issues

The path that was listed here for the mimer cluster stopped
working for mapping network drives. Plus, when displayed in
markdown, the double-back-slash turned into a single backslash,
which is wrong. This commit fixes both issues.

Specific changes:
  1. Updated text regarding Gorm wiki being out of date
  2. Restructured mapping of network drive text to have specific
     directions but also note to google if they don't work for
     you

Specific changes:
 - Connecting to the cluster
    * split into Windows/Unix subsections
    * added much more detail on how to
      configure PuTTY
 - Mounting cluster discs
    * updated Windows text for more details
      on how to map network drives
 - Preparation
    * Changed relative path to wine config
      script to an absolute path, since it
      wasn't clear where the pbsutils path
      was and I didn't know if it was on the
      PATH
 - TODO (comment in beginning of file)
    * Separated into "TODO" and "DONE"
    * Moved a few items to "DONE"

conda-forge channel doesn't need to be defined with full URL