Create Dates.sql

Calendar table for date calculations
Update GetGraphDataForStat.sql

Utilize new Dates table
Merge branch 'master' of https://github.com/BlueHerons/StatTracker into google-oauth-refactor
Merge branch 'master' of https://github.com/BlueHerons/StatTracker
Merge branch 'master' of https://github.com/BlueHerons/StatTracker into google-oauth-refactor
Merge pull request #10 from BlueHerons/google-oauth-refactor

Removing min="" attribute from input fields
Replacing Googth OAuth with pure-server side slow.
Merge branch 'master' of https://github.com/BlueHerons/StatTracker into google-oauth-refactor