Colourise Core Output Text (#1471)

* Define colours within COL_TABLE
* Do not output colours for non-terminal instances
* Removed ":::"
* Fixed indenting & spacing
* Made output consistent throughout project
* Reworded text to fit on standard 80 char wide Terminal screen
* Made 'sudo raspi-config' warning (insufficient disk space) only show on RPi
* Make "Installation/Update Complete" the final msg
* Remove redundant messages
* Simplify update available message
* Confirm user would like to begin uninstall
* If "git pull" string says "Already up-to-date.", place [i] before it
* Colour Temp/Interface output
* Made `pihole disable 5z` invalid
* Added error fallback if invalid argument (not s/m) is detected
* Quoted "$2" for consistency
* Updated help text
* L185/286: Replaced echo with redirect
* User agents for adblock.mahakala.is/adaway.org unnecessary 
* Print newline on confirmation of repository reset
* Add output to admin-related dnsmasq restarts
* Return error message for "pihole -q"
* Imply default checkout behaviour with y/N
* Fix uninstall failing to remove pihole user
* Print checkout 'git remote show origin' STDERR on new line
* Replaced checkout "AdminLTE" wording with "Web Admin"

advanced/Scripts/COL_TABLE

@@ -0,0 +1,28 @@
+if [[ -t 1 ]] && [[ $(tput colors) -ge 8 ]]; then
+  COL_NC=''
+  COL_WHITE=''
+  COL_BLACK=''
+  COL_BLUE=''
+  COL_LIGHT_BLUE=''
+  COL_GREEN=''
+  COL_LIGHT_GREEN=''
+  COL_CYAN=''
+  COL_LIGHT_CYAN=''
+  COL_RED=''
+  COL_LIGHT_RED=''
+  COL_URG_RED=''
+  COL_PURPLE=''
+  COL_LIGHT_PURPLE=''
+  COL_BROWN=''
+  COL_YELLOW=''
+  COL_GRAY=''
+  COL_LIGHT_GRAY=''
+  COL_DARK_GRAY=''
+fi
+
+TICK="[${COL_LIGHT_GREEN}✓${COL_NC}]"
+CROSS="[${COL_LIGHT_RED}✗${COL_NC}]"
+INFO="[i]"
+QST="[?]"
+DONE="${COL_LIGHT_GREEN} done!${COL_NC}"
+OVER="\r\033[K"