add documentation for eb --extended-dry-run

[boegel]

see easybuilders/easybuild-framework#1388

preview available at http://boegel-eb.readthedocs.org/en/extended_dry_run/Extended_dry_run.html

should be fleshed out a bit more, including:

• mentioning --disable-extended-dry-run-ignore-errors
• more details about simulating of module load of missing modules (esp. the toolchain module)
• guidelines for making easyblocks fully compatible with --extended-dry-run

[rjeschmi]

double negative is harder to read. Perhaps change to "likely" or "possible" or "probable"

[boegel]

ok, thanks

[rjeschmi]

Do we link to the changelog here?

[boegel]

You mean release notes?

I can, but they still need to be fleshed out for the upcoming v2.4.0.

I can get them started and only include an entry for easybuilders/easybuild-framework#1388 though, so I will, and include a reference here.

[rjeschmi]

looks fine, some typos.

I think the apply_regex_substitutions is an important feature to highlight, since it will probably become our "best practice" rather than one line patch files...

[boegel]

Good to go now easybuilders/easybuild-framework#1388 is merged in.

Thanks for the review @rjeschmi