Adding bamtools to devteam collection. This will close my own bamtools r...

...epo. Package bamtools also included in this commit.
They all use this pattern - I would be tempted to to wrap the param in a conditional that defaults to a `multiple=true` input but allows the user to use a repeat if that is more appropriate. Macros can probably be used to ensure this is done uniformly across the tools and in the command-block.

If that sounds reasonable @nekrut I would be happy to followup with these changes. If it is too much complexity and you want to keep the simple repeat that is totally reasonable too though.