Category Tree: Reduce number of categories

sphinx -> search
unicorn -> webserver
moved some plugins to other dirs to get better seconde level heading

plugins/unicorn/unicorn_

@@ -21,7 +21,7 @@ if [ "$mode" = "memory" ]; then
         if [ "$1" = "config" ]; then
                 echo "graph_title Total Unicorn Memory"
                 echo "graph_vlabel Total RAM"
-                echo "graph_category Unicorn"
+                echo "graph_category webserver"
                 echo "graph_args --base 1024"
                 echo "ram.label Total RAM"
                 exit 0
@@ -42,7 +42,7 @@ elif [ "$mode" = "processes" ]; then
         if [ "$1" = "config" ]; then
                 echo "graph_title Unicorn Processes"
                 echo "graph_vlabel Processes"
-                echo "graph_category Unicorn"
+                echo "graph_category webserver"
                 echo "processes.label active processes"
         else
                 echo -n "processes.value "
@@ -55,7 +55,7 @@ elif [ "$mode" = "average" ]; then
         echo 'graph_title Unicorn Average Process Size'
         echo 'graph_args --base 1024 -l 0 '
         echo 'graph_vlabel Average Process Size'
-        echo 'graph_category Unicorn'
+        echo 'graph_category webserver'
         echo 'unicorn_average.label Average Process Size'
         echo 'unicorn_average.draw LINE2'
         echo 'unicorn_average.info The average process size for Unicorn'

plugins/unicorn/unicorn_memory_status

@@ -74,7 +74,7 @@ when "config"
   puts "graph_title Unicorn [#{File.basename(__FILE__).gsub(/^unicorn_memory_status_/, '')}] - Memory usage"
   puts "graph_args --base 1024 -l 0"
   puts "graph_vlabel bytes"
-  puts "graph_category Unicorn"
+  puts "graph_category webserver"
   puts "total_memory.label total_memory"
   puts "total_memory.draw LINE2"
 else

plugins/unicorn/unicorn_status

@@ -72,7 +72,7 @@ when "config"
   puts "graph_title Unicorn [#{File.basename(__FILE__).gsub(/^unicorn_status_/, '')}] - Status"
   puts "graph_args -l 0"
   puts "graph_vlabel number of workers"
-  puts "graph_category Unicorn"
+  puts "graph_category webserver"
   puts "total_worker.label total_workers"
   puts "idle_worker.label idle_workers"
 else