Move external libs into vendors folder

Makefile to update vendors should maybe be a bash script. it is
however only ment to be run by developers.

Maybe vendors should be a git-subtree(1) instead Maybe we should
always supply a bash-it-init.bash(or some other name) file to the
vendoer forlder so we have a standardized way of loading vendor libs
from bash_it.sh

bash_it.sh

@@ -49,6 +49,13 @@ do
   fi
 done
 
+#Load external vendor libraries
+# See "${BASH_IT}/vendors/Makefile for comments
+for _bash_it_config_file in "${BASH_IT}/vendors/*/*.bash"
+do
+    source "$_bash_it_config_file"
+done
+
 # Load the global "enabled" directory
 # "family" param is empty so that files get sources in glob order
 # shellcheck source=./scripts/reloader.bash

lib/preview.bash

@@ -1,19 +0,0 @@
-if [[ $BASH_PREVIEW ]];
-then
-  unset BASH_PREVIEW #Prevent infinite looping
-  echo "
-
-  Previewing Bash-it Themes
-
-  "
-
-  THEMES="$BASH_IT/themes/*/*.theme.bash"
-  for theme in $THEMES
-  do
-    BASH_IT_THEME=${theme%.theme.bash}
-    BASH_IT_THEME=${BASH_IT_THEME##*/}
-    echo "
-    $BASH_IT_THEME"
-    echo "" | bash --init-file "${BASH_IT}/bash_it.sh" -i
-  done
-fi

vendors/Makefile

@@ -0,0 +1,14 @@
+# Maybe this should be a bash script.
+# This is however only ment to be run by developers.
+
+help:
+	@echo "make one of the following targets" 
+	@echo
+	@egrep "^[0-9a-zA-Z\-]+:$$" Makefile | grep -v "help:"
+
+update-preexec:
+	# - Maybe we should make this into a git-subtree(1) instead
+	# - Maybe we should always supply a bash-it-init.bash file to the vendoer forlder so we have a 
+	#   standardized way of loading vendor libs from bash_it.sh
+	wget -q -O bash-preexec/preexec.bash https://github.com/rcaloras/bash-preexec/raw/master/bash-preexec.sh
+	wget -q -O bash-preexec/LICENSE.md https://github.com/rcaloras/bash-preexec/raw/master/LICENSE.md

vendors/bash-preexec/LICENSE.md

@@ -0,0 +1,21 @@
+The MIT License
+
+Copyright (c) 2017 Ryan Caloras and contributors (see https://github.com/rcaloras/bash-preexec)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendors/bash-preexec/URL

@@ -0,0 +1 @@
+https://github.com/rcaloras/bash-preexec