Merge branch 'config-file' of ceda/Wish into master

Wish is now configured by a config file (although WISH_PLUGINS and
WISH_RIGHT_PLUGINS are still used as a fallback if no config file is
found. This way old setups won't break). Config file allows for higher
customization and re-use of plugins and is easier to maintain for
users. Add gINIe parser to Wish. Parse a gINIe config file for wish
config. Wrappers around plugins are created to allow re-use with
multiple configs and themes.

plugins/path_powerline.sh

@@ -24,7 +24,7 @@ function wish_path_lensum() {
 function wish_path_powerline_shrink() {
 	local IFS='/'
 	local path=( $1 )
-	local max=$2
+	local max=$(( $2 - 3 * ${#path[@]} ))
 	for ((i=0; i <$((${#path[@]} - 1)); i++)); do
 		path[$i]=${path[$i]:0:1}
 		if [[ $(wish_path_lensum ${path[@]}) -lt $max ]]; then

plugins/vcs.sh

@@ -10,7 +10,7 @@ function wish_vcs_set_colors() {
 	WISH_VCS_FG=${WISH_VCS_FG:-$WISH_DEFAULT_FG}
 	WISH_VCS_BG=${WISH_VCS_BG:-$WISH_DEFAULT_BG}
 	WISH_VCS_GIT_SYMBOL=${WISH_VCS_GIT:-}
-	WISH_VCS_DEFAULT=${WISH_VCS_DEFAULT:-$}
+	[[ -v WISH_VCS_DEFAULT ]] || WISH_VCS_DEFAULT="$"
 	WISH_VCS_GIT_UNTRACKED_SYMBOL=${WISH_VCS_GIT_UNTRACKED_SYMBOL:-●}
 }