[Feature] - Add athena lib for global variable and luigi
[File Info] - Rename the python file
[File Info] - Remove the uncessary file
[Fix] - Correct the Import Error
Merge pull request #1 from challenging/cleaner

[Feature] - Cleaner
[Fix] - Import Error
[Feature] - Add an error code for the abnormal number
[Feature] - Data Prepare after Cleaner
Merge pull request #2 from challenging/data_prepare

[Feature] - Data Prepare after Cleaner
[Feature] - Calculate the individual purchasing interval
Merge pull request #3 from challenging/individual_interval

[Feature] - Calculate the individual purchasing interval
Merge branch 'master' into cleaner

Conflicts:
	modules/cleaner/bin/cleaner.py