remove some code cruft
atomspace: remove more old cruft
atomspace: fix recently broken utest
atomspace: remove the getSize ASR
atomspace: remove the node count, link count ASR
provide a wrapper for the Impl class
atomspace: get rid of the addNode, addLink ASR
atomspace: remove the removeAtom ASR
atomsapce: remove the getHandle ASR
atomsapce: remove the attention value ASRs
benchmark: fix strange dependency bug
remove misc un-needed ASR's
move calls from Impl to attention bank
atomspace: remove assorted truth value ASR's
atomspace: remove the fetch/store ASR's
atomspace: remove getHandelSet ASRs
atomspace: fix failing unit test
atomspace: clean up error message
cython: convert atomspace exceptions to python
cython utest: catch exception when thrown