Fixes #44 error "subword-mode is not currently registered as a minor mode"
Remove annoying and unneeded yasnippet loading on idle
Change default aspell dictionary to english instead of en (not working on windows with cygwin aspell)
Fixes #45 maximize frame if dotspacemas-fullscreen-at-startup is t

Also add toggles for both frame maximization and fullscreen.
Can pass font options in spacemacs/set-font
Disable EDTS on Windows (not officialy supported for now)
Add vi-tilde-fringe extension
Update screenshot
Add magit-gitflow and fix the `f` issue for feature

The solution to fix the `f` binding issue is to not
alter emacs-state-map. By keeping emacs map untouched
we have a fallback for modes like magit-gitflow which
require the `f` key.

Indeed with the current implementation of the `fd`
sequence it is not possible to guess what the `f` key
must do for a given mode. The only solution for now is
to keep one not modified state map (emacs is a good candidate
for this).