database connectivity

Database classes and UserDAO
Revert "This is Initial Commit After creating Package creation"

This reverts commit 4b5d94c4b68de5b90866954d55f6cf5c7efc3bb5.
reverting

reverting
Revert "Revert "This is Initial Commit After creating Package creation""

This reverts commit f363ac9a85422f8f2db904ede0a3f36016932439.
Merge branch 'master' of https://github.com/TeamMatharu/PlayNLearn

4df7e6a799f36542a33e0984.