Merge pull request #2084 from pjackson28/v3.0

Corrected Contributor guideline links
Added meaningfull error messages and error codes for the post-build
Fixed the post-build error messages
Attempt to fix Travis color output for post build
Removed post-build colors to fic the message output
Added function for the post-build error message output
Removed new line after post build errors
Fixed incorrect documentation of fax icon
Merge pull request #2089 from J-Kat/patch-2

Fixed documentation of fax icon
Updated the secure variables
Grids: fixes #2069 left/right margin on nested grid cells
Merge pull request #2096 from patheard/nested-grids

Grids: fixes #2069 left/right margin on nested grid cells
Tweaked project mega menu navigation.