engine:
engine:

Refactored `get_input` and renamed it `get_or_create_input`. This can
now be used the same way as before, but can also be used for
bootstrapping calculations, in contexts outside of the engine as a
command line tool.


Former-commit-id: f19b620d691661d7343d538d33566757a67e40ee [formerly f19b620d691661d7343d538d33566757a67e40ee [formerly 9f1c787e92f2bd310668888e5c9fc352743beed7]]
Former-commit-id: 1253026d4f3774619b90516fe7a088ad2bde1d16
Former-commit-id: a6a11a577bb022b292592ede886a71966defdb7f
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine