- generate images automatically using grunt (Gruntfile.js)
- remove README.md
- skip more files from moving to _site (_config.yml)
- new liquid tag plugin for pictures (_plugins/picture.rb)
- update posts with discuss comments and to use the new picture tag
- fix less
-- margins on figures
-- do not screw up the margin when using containers
-- add a default 2px margin
Merge branch 'ironkman' into gh-pages

Conflicts:
	images/default-thumb.png