chg: Added sort by value or name option for tag statistics API
chg: Added sort by value or name option for tag statistics API

- usage: mymisp/tags/tagStatistics/[percentage]/[name-sort]
  - both percentage and name-sort accept true/false
  - false is always the default setting
  - percentage set to true will show the tags by % instead of a count
  - name-sort set to true will sort the results by the namespace, alternatively by the count/percentage

SteveClement/MISP,Rafiot/MISP,FIRSTdotorg/MISP,Rafiot/MISP,crruthe/MISP,crruthe/MISP,FloatingGhost/MISP,FIRSTdotorg/MISP,crruthe/MISP,SteveClement/MISP,Rafiot/MISP,RichieB2B/MISP,FloatingGhost/MISP,cristianbell/MISP,FloatingGhost/MISP,cristianbell/MISP,SteveClement/MISP,MISP/MISP,cristianbell/MISP,MISP/MISP,SteveClement/MISP,MISP/MISP,MISP/MISP,TheDr1ver/MISP,cristianbell/MISP,FIRSTdotorg/MISP,devnull-/MISP,devnull-/MISP,RichieB2B/MISP,TheDr1ver/MISP,FIRSTdotorg/MISP,FloatingGhost/MISP,SteveClement/MISP,devnull-/MISP,TheDr1ver/MISP,RichieB2B/MISP,TheDr1ver/MISP,MISP/MISP,RichieB2B/MISP,crruthe/MISP,devnull-/MISP,Rafiot/MISP