Merge pull request #8 from anuradha1992/master

Some modifications
nothing much
addes gui for registration officer
Completed availability
DB access for Add new donor code written
Merge pull request #9 from UpekkaA/master

Add new Donor form completed with DB access
Merged Upekkas request
new models added
Merged anu made models
Merge branch 'anuradha1992-master'
Merged all the models
Added missing models
Some more interfaces done