Added IntelliJ IDEA project/workspace files to gitignore. (#4377)
Added IntelliJ IDEA project/workspace files to gitignore. (#4377)

By default IntelliJ stores its project/workspace files and metadata under the project parent directory.  This commit simply ensures that GIT will ignore these files and prevent them from being committed to source control.
kuijp/openhab,cdjackson/openhab,Mixajlo/openhab,hmerk/openhab,idserda/openhab,sytone/openhab,idserda/openhab,rmayr/openhab,ssalonen/openhab,rmayr/openhab,andreasgebauer/openhab,joek/openhab1-addons,joek/openhab1-addons,RafalLukawiecki/openhab1-addons,dmize/openhab,sumnerboy12/openhab,mvolaart/openhab,frami/openhab,dmize/openhab,robnielsen/openhab,doubled-ca/openhab1-addons,doubled-ca/openhab1-addons,wuellueb/openhab,svenschaefer74/openhab,aschor/openhab,wuellueb/openhab,joek/openhab1-addons,hmerk/openhab,gerrieg/openhab,idserda/openhab,juri8/openhab,savageautomate/openhab,TheNetStriker/openhab,doubled-ca/openhab1-addons,frami/openhab,jowiho/openhab,ssalonen/openhab,gerrieg/openhab,basriram/openhab,dbadia/openhab,svenschreier/openhab,cvanorman/openhab,kuijp/openhab,hmerk/openhab,doubled-ca/openhab1-addons,cvanorman/openhab,svenschaefer74/openhab,ollie-dev/openhab,docbender/openhab,andreasgebauer/openhab,sibbi77/openhab,druciak/openhab,jowiho/openhab,sytone/openhab,kreutpet/openhab,sibbi77/openhab,Snickermicker/openhab,sibbi77/openhab,theoweiss/openhab,TheNetStriker/openhab,watou/openhab,robnielsen/openhab,wuellueb/openhab,theoweiss/openhab,savageautomate/openhab,querdenker2k/openhab,robnielsen/openhab,TheOriginalAndrobot/openhab,juri8/openhab,Snickermicker/openhab,computergeek1507/openhab,robnielsen/openhab,gerrieg/openhab,RafalLukawiecki/openhab1-addons,doubled-ca/openhab1-addons,aschor/openhab,andreasgebauer/openhab,falkena/openhab,druciak/openhab,docbender/openhab,seebag/openhab,kreutpet/openhab,dbadia/openhab,svenschreier/openhab,ssalonen/openhab,theoweiss/openhab,TheNetStriker/openhab,kuijp/openhab,hemantsangwan/openhab,RafalLukawiecki/openhab1-addons,ollie-dev/openhab,dmize/openhab,robnielsen/openhab,berndpfrommer/openhab,wuellueb/openhab,openhab/openhab,lewie/openhab,ssalonen/openhab,svenschreier/openhab,QuailAutomation/openhab,TheOriginalAndrobot/openhab,druciak/openhab,sibbi77/openhab,cvanorman/openhab,basriram/openhab,dmize/openhab,savageautomate/openhab,svenschaefer74/openhab,TheOriginalAndrobot/openhab,sytone/openhab,sumnerboy12/openhab,dbadia/openhab,cdjackson/openhab,bbesser/openhab1-addons,LaurensVanAcker/openhab,openhab/openhab,berndpfrommer/openhab,aschor/openhab,seebag/openhab,Mixajlo/openhab,frami/openhab,LaurensVanAcker/openhab,lewie/openhab,ollie-dev/openhab,ssalonen/openhab,dbadia/openhab,Mixajlo/openhab,theoweiss/openhab,kreutpet/openhab,cdjackson/openhab,jowiho/openhab,cvanorman/openhab,Snickermicker/openhab,querdenker2k/openhab,sumnerboy12/openhab,CrackerStealth/openhab,svenschaefer74/openhab,cvanorman/openhab,QuailAutomation/openhab,QuailAutomation/openhab,bbesser/openhab1-addons,berndpfrommer/openhab,dmize/openhab,idserda/openhab,QuailAutomation/openhab,jowiho/openhab,juri8/openhab,LaurensVanAcker/openhab,idserda/openhab,basriram/openhab,CrackerStealth/openhab,basriram/openhab,seebag/openhab,juri8/openhab,frami/openhab,falkena/openhab,docbender/openhab,seebag/openhab,cdjackson/openhab,rmayr/openhab,falkena/openhab,lewie/openhab,Snickermicker/openhab,robnielsen/openhab,berndpfrommer/openhab,falkena/openhab,aschor/openhab,cdjackson/openhab,wuellueb/openhab,Snickermicker/openhab,kuijp/openhab,berndpfrommer/openhab,cvanorman/openhab,CrackerStealth/openhab,CrackerStealth/openhab,querdenker2k/openhab,kreutpet/openhab,sibbi77/openhab,sumnerboy12/openhab,falkena/openhab,frami/openhab,docbender/openhab,mvolaart/openhab,hemantsangwan/openhab,lewie/openhab,Mixajlo/openhab,openhab/openhab,Mixajlo/openhab,openhab/openhab,cdjackson/openhab,watou/openhab,andreasgebauer/openhab,doubled-ca/openhab1-addons,mvolaart/openhab,lewie/openhab,CrackerStealth/openhab,kuijp/openhab,idserda/openhab,svenschaefer74/openhab,querdenker2k/openhab,wuellueb/openhab,Mixajlo/openhab,rmayr/openhab,mvolaart/openhab,jowiho/openhab,computergeek1507/openhab,docbender/openhab,watou/openhab,ssalonen/openhab,TheOriginalAndrobot/openhab,watou/openhab,falkena/openhab,joek/openhab1-addons,gerrieg/openhab,LaurensVanAcker/openhab,kuijp/openhab,svenschreier/openhab,RafalLukawiecki/openhab1-addons,ollie-dev/openhab,theoweiss/openhab,basriram/openhab,sibbi77/openhab,docbender/openhab,querdenker2k/openhab,svenschreier/openhab,QuailAutomation/openhab,savageautomate/openhab,juri8/openhab,druciak/openhab,TheOriginalAndrobot/openhab,TheNetStriker/openhab,watou/openhab,Snickermicker/openhab,openhab/openhab,svenschreier/openhab,mvolaart/openhab,seebag/openhab,kreutpet/openhab,computergeek1507/openhab,kreutpet/openhab,querdenker2k/openhab,andreasgebauer/openhab,falkena/openhab,basriram/openhab,savageautomate/openhab,RafalLukawiecki/openhab1-addons,lewie/openhab,aschor/openhab,computergeek1507/openhab,ollie-dev/openhab,QuailAutomation/openhab,docbender/openhab,openhab/openhab,bbesser/openhab1-addons,LaurensVanAcker/openhab,joek/openhab1-addons,hmerk/openhab,LaurensVanAcker/openhab,sumnerboy12/openhab,dbadia/openhab,gerrieg/openhab,frami/openhab,hemantsangwan/openhab,TheNetStriker/openhab,hemantsangwan/openhab,TheNetStriker/openhab,dmize/openh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