Added new script to build and install the AVR toolchanin for MeshThing

This script, which is only needed until Meshthing is merged into
the upstream tools, will build gcc, binutils, avrdude for Meshthing

See http://www.m9design.co/ for Meshthing details
Added support for update checks

1) Added new feature to encourage users to update using apt-get
2) Makde user exprience more consistant
3) Fixed some spelling mistakes
Paclage  oracle-java7-doc no longer avliable
Missing "
make sure apt-get update is logged
Check apt-get upgrade has been run

Make sure user does not get spurious error messages when apt-get update has nothing to do
fix up bash logic
Typo
Merge pull request #9 from alecthegeek/Add_apt_get_check

Add apt get check