Merge branch 'release/1.19' into develop

* release/1.19:
  Update changelog
  Bump version to v1.19
Add new(ish) twig functions to addons readme
Added ability to configure fuelphp root path
Add exnor to contributers
Bump version to v1.20
Bump copyright year to 2013
Update changelog
Merge branch 'release/1.20'

# By Antony Male (5) and Adam McCann (1)
* release/1.20:
  Update changelog
  Bump copyright year to 2013
  Bump version to v1.20
  Add exnor to contributers
  Added ability to configure fuelphp root path
  Add new(ish) twig functions to addons readme