Adds list-tags option

This will list the tags along with the number of number of times it is
used.

An optional --noheader flag can be passed after the command to prevent
the header being printed.

e.g.

```
$ kb list-tags
name              count
----------------  -----
Linux             2
Authentication    1
Pentesting        1
Enumeration       3
Network Protocol  2
```

```
$ kb list-tags --noheader
Linux             2
Authentication    1
Pentesting        1
Enumeration       3
Network Protocol  2
```

This --noheader flag was also added to the list command

Close #10

inc/tag-management

@@ -64,3 +64,20 @@ assignTags(){
 	
 
 }
+
+listTags(){
+	vecho "listTags $*"
+	cd "$dataDir" || return
+	local header="--header"
+	[ "$1" = "--noheader" ] && header=""
+	echo "SELECT tags.name,COUNT(links.id) count
+		FROM tags LEFT JOIN links ON tags.id = links.tagID
+		GROUP BY tags.id" |
+		sqlite3 --column $header "${sqliteFile}"
+	#echo "SELECT items.id,items.filename,items.title,items.type,
+	#GROUP_CONCAT(tags.name,',') tags
+	#FROM items LEFT JOIN links ON items.id = links.itemID
+	#LEFT JOIN tags ON links.tagID = tags.id
+	#GROUP BY items.id;" |
+	#	sqlite3 --column --header "${sqliteFile}"
+}

kb

@@ -204,12 +204,14 @@ gitChange(){
 listEntries(){
 	vecho "listEntries $*"
 	cd "$dataDir" || return
+	local header="--header"
+	[ "$1" = "--noheader" ] && header=""
 	echo "SELECT items.id,items.filename,items.title,items.type,
 	GROUP_CONCAT(tags.name,',') tags
 	FROM items LEFT JOIN links ON items.id = links.itemID
 	LEFT JOIN tags ON links.tagID = tags.id
 	GROUP BY items.id;" |
-		sqlite3 --column --header "${sqliteFile}"
+		sqlite3 --column $header "${sqliteFile}"
 }
 
 fuzzySelect(){
@@ -301,6 +303,7 @@ mainScript() {
 		new) newFile "${args[@]:1}"; safeExit ;;
 		edit) editFile "${args[@]:1}"; safeExit ;;
 		list) listEntries "${args[@]:1}"; safeExit ;;
+		list-tags) listTags "${args[@]:1}"; safeExit ;; 
 		view) viewFile "${args[@]:1}"; safeExit ;;
 		fuzzy) fuzzySelect "${args[@]:1}"; safeExit ;;
 		deepsearch) deepSearch "${args[@]:1}"; safeExit ;;
@@ -341,6 +344,9 @@ usage() {
 		--filetype <type>   Type of file ( default md)
 	edit [title]            Edit a file
 	list                    List all files
+		--noheader          Don't include the header
+	list-tags               Lists tags with the number of times its used
+		--noheader          Don't include the header
 	view                    View a file
 	fuzzy [command]         Fuzzy select a file
 		command is what to do with the selected file