modified user login validation and user login session using php
fixed userlogin validation
changed home.html to home.php
Merge pull request #45 from ThuThreeFour/userLogin

changed validation of user credentials, login and logout session. And changed home.html to home.php in home.php, writeJson.php, and validateRegistartionForm.js
Made home.php work with employeeDatajs.js
Merge pull request #46 from jacob-nappi/userLogin

Made home.php work with employeeDatajs.js
Merge pull request #47 from C-Compton/userLogin

User login