Update request -> event deprecation in plugins
Remove the '=' from the set command
Remove obsolete comment
Merge branch 'dev/remove-equal-from-set' into mathstuf/next

* dev/remove-equal-from-set:
  Remove obsolete comment
  Remove the '=' from the set command
  Update request -> event deprecation in plugins
Rewrite the main README file
Configure uzbl-browser for PREFIX
Add a target for uzbl.desktop
Quote variable expansion in uzbl-browser
Move '!' outside the test block
Simplify uzbl-browser logic
Document the dir1:dir2:dir3:subpath behavior
Embed uzbl subdir in the XDG _home variables
Remove unimplemented event