add add_prescription page

git-svn-id: https://markus.cdf.toronto.edu/svn/csc207-2014-09/group_0909/app@177 8153ec5e-17d7-4962-8641-23ff7c14a8d4
add 2 buttons in main_activity, add patients without seen a doctor page

git-svn-id: https://markus.cdf.toronto.edu/svn/csc207-2014-09/group_0909/app@178 8153ec5e-17d7-4962-8641-23ff7c14a8d4
add a button(Add Prescription) in activity_patient_info.xml

git-svn-id: https://markus.cdf.toronto.edu/svn/csc207-2014-09/group_0909/app@179 8153ec5e-17d7-4962-8641-23ff7c14a8d4
fix variable name

git-svn-id: https://markus.cdf.toronto.edu/svn/csc207-2014-09/group_0909/app@180 8153ec5e-17d7-4962-8641-23ff7c14a8d4