…stigate memory allocation for Doc instances

…ose() to force memory clean-up since GC takes too long to kick-in

… help check memory usage

…on Doc constructor

…lls to Doc.Dispose()

…eading it to prevent memory leaks

…e ReadGuid task

… after reading it to prevent memory leaks

…erveClear() to prevent duplicate disposal

…tion.SubDocs() to prevent duplicate disposal

… on ReferenceAccessor.Access()

….InsertRange()

…ayEnumerator classes

…ut cells

…rveClear()