fix sourcing paths, use relatives

bashrc_overrides/_all

@@ -7,7 +7,5 @@ for source in colored_commands \
               safety_aliases \
               terminal_colors \
               terminal_fancyfying; do
-  if [ -f ~/.bashrc_overrides/$source ]; then
-    . ~/.bashrc_overrides/$source
-  fi
+  . "$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )/$source"
 done