Update README.md

moved todo, to wiki
updated form default values
Merge branch 'master' of https://github.com/atomicjam/helpdesk
Merge pull request #5 from EdibleMonkey/master

SQL added 'closed calls in given number of days'
added session data to my calls php instead cookies, which now works with ldap
Merge branch 'master' of https://github.com/atomicjam/helpdesk
using session data instead of cookie
updated engineers form with new fields in db
removed old function and updated style
graphs and concept artwork
Merge branch 'master' of https://github.com/atomicjam/helpdesk
Merge