openquake.engine.__init__:

Once `openquake.engine` is imported, we can get the version number as a
string by accessing `openquake.engine.__version__`. This is typical of
many libraries.
bin/openquake:

Simplified version reporting, when the user asks `bin/openquake --version`
bin/oq_create_db:

Use `openquake.engine.__version__` for capturing the software version num
docs/source/conf.py:

Update project name from "OpenQuake" to "OpenQuake Engine".
docs/source/conf.py:

Use `openquake.engine.__version__` add the version number to the docs
docs/source/index.rst:

Removed a comment
docs/source/index.rst:

Updated the index header to say "OpenQuake Engine" instead of "OpenQuake"
bin/openquake:

Removed an unused import.
Merge pull request #1118 from larsbutler/update-version-1.0

Update version to 1.0

[r=matley] [r=*trivial]