Make `--map` the default behaviour

[jakenvac]

It's frustrating to have to type this flag every time I want to add a package when it's required 85% of the time.

It would be nice if the behavior was the default and the user only needs to add things like --nest & --pkg when they're required.

Some other options:

• The option to globally set the default package provider (flags would then only be needed for the non-default)
• Set a default provider in a .trexrc file or something similar for local config.

[buttercubz]

i'm agree with you, i'm currently working in trex config file or global configuration