v0.3.0

This version changed the config file handling. PowerGRR supports now
the user profile or the module root as locations for the config file. This
is useful when updating PowerGRR through with Update-Module because each
version is stored in an own folder. Using the profile folder for the config
prevents from constantly moving your config file. Beside the file name change
different improvements were made in regards to config checks.

The dynamic parameters which are used in Invoke-GRRFlow and New-GRRHunt
are now autocompleted correctly. The change in the parameter handling
mitigates a PowerShell bug, see details below.

The dynamic parameters in New-GRRHunt were improved. The 'OS' and the
'Label' parameter are now defined as dynamic parameters and are only shown
based on the corresponding rule type. Furthermore, the label handling was
improved to only run a hunt if at least one label was valid (that means found
in GRR).

See CHANGELOG for full version information.