update mf
support for glyphs_preview file

the glyphs preview file contains only a subset of all the available
glyphs of the font. this is used for the preview, as we don't
need to generate all the glyphs.
mf2pt1 -> mf2outline
add adjuster and bespoke directly as submodules

no need for the intermediate metaflop-font repo.
this is cumbersome for no reason.
use font_preview.mf only for preview
deploy from dev branch to staging
sort fonts alphabetically (adjuster 1.)
update adjuster metafont text
add adjuster hello world images

the random algorithm now works on the files that
need to be read for randomly selecting a sample,
as the languages are not the same anymore for
each one of the sequence numbers.
update metafonts adjuster derivations
update metafonts adjuster showcase
update adjuster
shuffle helloworld images
add nyan cat rspec formatter
remove obsolete specs
select dropdown option for stored fonts (url hash)
not beta anymore
sort gemfile
use sprockets for assets
don't exec modulator js on other pages