Update OpenStack_Grizzly_Install_Guide.rst

Simplified glance image creation steps
Merge pull request #26 from erikzaadi/patch-1

Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Little wget improvement :)
Merge pull request #27 from Dr4ik/patch-1

Little wget improvement :)
Correct a command line option

In the test of glance, the image-create had left out the --location argument which may cause a failure.
Merge pull request #29 from tcatyb/patch-1

Correct a command line option
Added some info on where to paste these lines

Well, to make it more clear for newbies and also for saving some time on deciding to either paste it all together or under the required section (better practise, may work without it)
Merge pull request #33 from dguitarbite/patch-1

Added some info on where to paste these lines
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst
Update OpenStack_Grizzly_Install_Guide.rst