Added table of contents + revised Cast Efficiency section
Added table of contents + revised Cast Efficiency section

- Table of contents uses existing headers and important subheaders.
- Cast Efficiency section revised mostly for format consistency & minor wording.

WoWAnalyzer/WoWAnalyzer,yajinni/WoWAnalyzer,WoWAnalyzer/WoWAnalyzer,hasseboulen/WoWAnalyzer,enragednuke/WoWAnalyzer,fyruna/WoWAnalyzer,yajinni/WoWAnalyzer,fyruna/WoWAnalyzer,Juko8/WoWAnalyzer,ronaldpereira/WoWAnalyzer,WoWAnalyzer/WoWAnalyzer,sMteX/WoWAnalyzer,FaideWW/WoWAnalyzer,ronaldpereira/WoWAnalyzer,enragednuke/WoWAnalyzer,hasseboulen/WoWAnalyzer,Juko8/WoWAnalyzer,anom0ly/WoWAnalyzer,FaideWW/WoWAnalyzer,hasseboulen/WoWAnalyzer,anom0ly/WoWAnalyzer,anom0ly/WoWAnalyzer,fyruna/WoWAnalyzer,anom0ly/WoWAnalyzer,yajinni/WoWAnalyzer,sMteX/WoWAnalyzer,yajinni/WoWAnalyzer,Juko8/WoWAnalyzer,sMteX/WoWAnalyzer,enragednuke/WoWAnalyzer,FaideWW/WoWAnalyzer,ronaldpereira/WoWAnalyzer