add description for all scripts

Not all scripts had a description
Merge pull request #10 from BertLindeman/patch-1

add description for all scripts
Rename references and links to brickman
Merge pull request #11 from WasabiFan/brickdm-rename

Rename references and links to brickman
add contributing page
Merge pull request #9 from dlech/contrib

add contributing page
Maintain a subset of the nav links when switching to mobile view