algorithm for deleting a possession link when possible
atom wrapper for better time weighting
documentation changes
new test atoms for testing possession
fixes code for nullify possession link
Changed chunk-option to form

Changed the chunking critera to be based on the number of sentence form links instead of based on the number of verb/noun/adj/adv.
update README for recent chunk changes
Documentation amendment and bug fixes

Fixes the bug where an modifying link has no corresponding association
Merge pull request #1146 from williampma/microplanning

Microplanning: various changes