Merge pull request #5 from zjjott/master

finish save and load function
Merge pull request #6 from zjjott/master

add SimBaseException class
typo; fix SimTable clone method to remove garbage area in array
add writeFloat function:TODO
Merge branch 'master' of github.com:guokr/simbase
rm unused declr in json
add log4j; fix project.clj
commit
Merge branch 'master' of github.com:guokr/simbase
Fix clone function bug  
Add delete function and command
Add Payload writeFloat and readFload function