add repositories to workspace from source

[roxchgt]

It's the implementation of recently dicussed feature here: Issue #803

extends the addworkspace function as follows:
git bulk --addworkspace <ws-name> <ws-root-directory> (--from <URL or file>)

With option --from the URL to a single repository or a file containing multiple URLs can be added and they will be cloned diretly into the workspace. Suitable for the initial setup of a multi-repo project.

$ git bulk --addworkspace projectX ~/workspaces/projectx --from https://github.com/x/project-x.git

# OR with a file containing many repositories on each line:
$ git bulk --addworkspace projectX ~/workspaces/projectx --from ~/workspaces/repositories.txt

with repositories.txt be like:

https://github.com/x/project-x-1.git
https://github.com/x/project-x-2.git
https://github.com/x/project-x-3.git

[roxchgt]

Line 182 introducing 2 allowedargcount and checking if both of them are not equal to $paramcount is necessary to keep API working as before.

[spacewander]

@roxchgt
Please resolve the merge conflicts and also update the man/git-bulk.md(remember to generate the docs according to the man/Readme.md)

[roxchgt]

@spacewander

Please resolve the merge conflicts and also update the man/git-bulk.md(remember to generate the docs according to the man/Readme.md)

Done!

[spacewander]

@roxchgt
Merged. Thank you!