Merge pull request #143 from amcgee/fix-gsm-issues

Score.  Merging this then.
add export in front of four PATHs
Fix gsmtool example command syntax

The MIB address argument goes after the command designation, not before.
Merge pull request #144 from kgcooke/dev

add export in front of four PATHs
Remove old cruft from README

The link to the documentation page should be enough
Move modtool documentation to the doc folder so it's accessible.
Merge remote-tracking branch 'upstream/dev' into dev
Remove extraneous backtick.
Use lf (unix style) line endings for the python files in tools/bin (otherwise syncing on Windows and then running on Linux causes issues.