Finished designing most of the functions for hobbs mind agent
Added getNumberNode and propose rules, modified getChildren a little bit.
Modified getRoots.scm
Setting up testing environment completed, fixed a small bug in hobbs.py
Filtered out variable nodes in BindLinkExecution class.
add comment to the testing data.
Fixed some minor bugs, added getResults.scm
Fixed the inconsistent results bug, fixed minor bugs in propose.scm
Merge branch 'anaphora_resolution' of https://github.com/hujiewang/opencog into anaphora_resolution

Need to merge modified atomspace.scm
Fixed the sorting bug
Added some filters,moved BindLinkExe to another file.
Fixed filter bugs.
Updated readme file, made agent display resolution results on the cogserver console.
Cleaned up useless files.
Added filter-#4
Added documents, changed pronoun-finder to getPronoun, cleand up useless code.
Fixed small bugs in readme file.
Added summary to readme file.
Added testing results and a testing log
Fixed gender filters bugs.