Reduce cluttering the logs by logging command tags only for the external
applications used within Mixer.
Signed-off-by: Reagan Lopez <reagan.lopez@intel.com>
Implement the logging package for mixer.
A common log file can be set for all the mixer commands in the
builder.conf. E.g. `mixer config set Mixer.LOG <filepath>`
The log file and level can also be set for individual mixer
commands using the `--log` and `--log-level` flags respectively.
The various log levels are:
ERROR (1), WARNING (2), INFO (3), DEBUG (4) and VERBOSE (5).
Default log level is 4.
Fixes#666
Signed-off-by: Ashlesha Atrey ashlesha.atrey@intel.com