Start a new feature billing plans

Each user will choose from 3 different billing plans when register:

1. Normal
2. Friends and Family (Lower cost fom some users)
3. Free Sunday (No carfge durying sundays)
Add billing plan combo box
Give billing plan when register
Add new table for plans
Merge branch 'feature/billing-plans' of https://github.com/marioskogias/softeng into feature/billing-plans
Add factory sceleton
created factory for charging
Improve factory
Update db schema
fixed friend list management

Now all lists appear in friendlist splash
Adding a friend now works.
Revert "fixed labels of friend splash"

This reverts commit b13ae5ab3cbdd8b06952311ddaf81afc7544d72f.
Revert "added friend list managment"

This reverts commit 802cd8b9e4594187f86997d9be501c164f09bd1c.
Merge branch 'feature/billing-plans' into develop

Conflicts:
	description-and-code-base/SoftEng/SipCommunicator-Fall05/net/java/sip/communicator/db/FriendlistDB.java
	description-and-code-base/SoftEng/SipCommunicator-Fall05/net/java/sip/communicator/gui/FriendSplash.java