Support installing local tools into sections

[natefoo]

This alters the previous behavior slightly, tools that do not specify a section will be placed in a section named Local Tools whereas previously they would be outside of a section.

The old simple syntax is still supported:

galaxy_local_tools:
  - foo.xml
  - bar.xml

Is the same as:

galaxy_local_tools:
  - file: foo.xml
    section_name: Local Tools
  - file: bar.xml
    section_name: Local Tools

[hexylena]

"sure let's just add this tiny feature for admin training" "oh no everyone is using it"

thanks! this is a nice change, i need to start using this at work.

[microfuge]

This is super convenient! Thanks!