Extend :builtin to allow matching the complete `emacs-version'.

* el-get-recipes.el: If :builtin is a string use `version<=' to
  compare against `emacs-version'.

Minor version matching is required for `cl-lib' because it is a
builtin in version 24.3.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Recipe for cl-lib.

Properly prefixed CL functions and macros.  This is a builtin in 24.3.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
weechat recipe: Add cl-lib dependency.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Set minimum Emacs version on rainbow
add a recipe of git-gutter-fringe
Only accept strings for :builtin.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Add check for obsolete integer :builtin to check-recipe.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Convert integer :builtin to string and warn user.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Merge pull request #1083 from ruediger/cl-lib

Cl-lib recipe and improved :builtin property.