fix format specifier in VitalSigns.toString

git-svn-id: https://markus.cdf.toronto.edu/svn/csc207-2014-09/group_0909@128 8153ec5e-17d7-4962-8641-23ff7c14a8d4
reverse list of vital signs (so that newest shows at the top)

git-svn-id: https://markus.cdf.toronto.edu/svn/csc207-2014-09/group_0909@129 8153ec5e-17d7-4962-8641-23ff7c14a8d4
add PatientRecordListActivity

git-svn-id: https://markus.cdf.toronto.edu/svn/csc207-2014-09/group_0909@130 8153ec5e-17d7-4962-8641-23ff7c14a8d4