Fix _paragraphStyle==nil (always happen) 
Fix _paragraphStyle==nil (always happen) 

by adding init statement.
rgregg/DTCoreText,programming086/DTCoreText,Akylas/DTCoreText,xiaoyanit/DTCoreText,Cocoanetics/DTCoreText,pivotaltracker/DTCoreText,rgregg/DTCoreText,openresearch/DTCoreText,gnr/DTCoreText,Cocoanetics/DTCoreText,Cocoanetics/DTCoreText,Akylas/DTCoreText