It has few more features (like turning down verbosity) and looks nicer

This is a better maintained fork of lessphp. It seems to be fully
compatible, so this is more or less a drop in replacement.

This updates the SimplePie RSS parser to the recent 1.4.3 release,
fixing an PHP 7 bug (and probably others). We now use a composer based
install.

As suggested by Robin Getz locale .txt files can now be duplicated and
changed in the conf/lang/ directory and conf/plugin_lang/$plugin/
directory for plugins.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>