Merged tested pull requests and added manufacturer/oui functionality

[simonblack]

Changes:

• target by manufacturer with the -m, --manufacturer options. The matching is a simple substring match. I prefer it like this but can be extended
• show manufacturers columns with --showm
• skip pmkid with the --no-pmkid option Added --no-pmkid option #161
• WPS blank pin attack Added blank PIN attack #176
• added channel-hopping / multiple-channel selection args.py: Select multiple scan channels #145
• WPA personal vs enterprise distinction Wpa personal vs enterprise #163
• Ignore multiple ESSIDS with multiple -E option Ignore multiple ESSIDs with -E #166

merged parts of #181

[RaduNico]

Hello! If you'd like to merge the pull requests from other people could you please cherry-pick the commits made by everybody? As of now you merged the commits but if this PR is accepted you will be listed as the author for the commits - not the original authors. That way you can also keep the original commit messages. Cheers!

[simonblack]

Im a n00b at github, I'll have to have a read at the docs.
Had a feeling I did this wrong