updated ref to tango-plus submodule
adjusted theme colors
adjusted theme colors
new workstation specific configuration
created `turn-on-paredit-mode' function to hook on mode hooks.
added switch on function for slime style nav in emacslisp.
re-arranged emacslisp hook functions.
hooked on a rainbow delimiter mode switch.
clojure config changed to use cider.
use existing `enable-paredit-mode' func in the hooks.
company-cider backend is added.