Concatenation is good
update .gitignore
Update string to int
Merge branch 'jhow-dev' into Johnny
Merge branch 'Johnny' into jhow-dev
Small update
Merge branch 'Johnny' of https://github.com/jhowliu/DataMining into Johnny
Merge branch 'Johnny' into jhow-dev
Add I/S-Concatenation and utility calculation.
Merge branch 'Johnny' of https://github.com/jhowliu/DataMining into Johnny
Merge branch 'jhow-dev' into Johnny

Conflicts:
	function.cpp
Add function declarion into function.h
Compiler ok
Version 1.0
Add loader
Testing loader ok
Small update
Merge branch 'master' into jhow-dev
Merge branch 'jhow-dev'
Merge pull request #5 from jhowliu/master

Merge master into Johnny