#16 Added backbone scaffold for patient_diagnoses_all in doctor cabinet
#16 Added rake task for reading diagnoses from Excel file. Gem spreadsheet was added to Gemfile.
#16 Added diagnose search search
#16 Fixed routes. Added diagnose search
#16 Added appending diagnose name to patient's diagnoses list
#16 Added save patient diagnoses-form
#16 Added  patient_to_diagnoses
#16 Added  patient_to_diagnoses saving (read checkbox values from params[] and creating new patient_to_diagnoses)
#16 Added relations between PatientUser and Diagnoses
Close #16 Added all diagnoses rendering. Added ability assigning and unassig diagnoses