Added functionality to the Process entity, scripts use .genologicsrc, new qc_calculate_amount script.

- Added the methods all_inputs and parent_processes to the Process entity. This is a common task that will be useful  to have in the api wrapper.
- the .genologicsrc file is recommended to use instead of supplying login information via arguments.
- The qc_calculate_amount script updates input artifact udf 'Amount (ng)' by multiplying concentration and volume udfs.