Add a README file.
Add a README file.

glance-/libdivecomputer,glance-/libdivecomputer,henrik242/libdivecomputer,Poltsi/libdivecomputer-vms,venkateshshukla/libdivecomputer,venkateshshukla/libdivecomputer,henrik242/libdivecomputer,josh-wambua/libdivecomputer,josh-wambua/libdivecomputer