SigSession: Replaced do { } while(0) with { }

Change-Id: I0fdeb8f6cd37474f683f2461d7facabb99f28aa9
Signal: Added a reference to _session

Change-Id: Ic4509b63dd105f3d1d381abd22e05c31d089d20b
SigSession: Renamed get_device to device

Change-Id: I1005014fd55c5efcbe088a51579490a280d41d43
StoreSession: Removed commented code
.gitignore: Ignore vim .swo files
SigSession: Made _sr_session non-static

Change-Id: Idbc242e6a029a593098f3683dca87b236f0aab6b
SigSession: Added DeviceManager accessor functions

Change-Id: Iccfd8c2b62e9989e38dda34af33c78b50036d930