Calculate and update parameters through a task instead of request
Merging with updates made by arthasdk
Do not add index.yaml, modified .gitignore to ignore index.yaml
Merge pull request #4 from spikey360/master

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Merging with arthasdk work before day's work
Modified .gitignore to ignore .rar files, do not add rars
Whenever calculating params on-the-fly, write to db
Fixed task object from calculation all a,b,c values as same, removed transactional nature of task
Added cron job to re-calculate all parameters every 12 hours