Merge pull request #1 from medinakrivic/master

Added CRUD for Ranks
Update README.md
New tables for login system, new function in CRUD to add Student login info using AES
Merge branch 'master' of https://github.com/SaidSikira/ibu.sis
Minor fixes in CRUD
Config.java file added, update in getconnection() method, now gets database info from Config.java
Added crud func
Merge pull request #3 from sakibk/master

Added some CRUD functions