#162 -performance-getChild- replacing getChild calls wherever possible so that execution may be faster
#162 -performance-getChild- replacing getChild calls wherever possible so that execution may be faster


Former-commit-id: e46873beeeee61f84d1ba992a9b5c7bd9fe02e10
webgme/webgme-engine,webgme/webgme-engine,webgme/webgme-engine