Allow setting config file or data-folder by parameter

[FelixMoelder]

When installing interproscan via conda it is currently necessary to separately download the databases and add them to the interproscan folder (see post-link.sh).
While this is generally working many users will probably not noticing that this is required.
In addition there are cases where this procedure is not even applicable.
Especially when including the conda-package in a snakemake workflow.
As snakemake is maintaining conda-environments on its own it is not possible to include the database files in the environment.
This could be easily solved in two ways by allowing to:

• define a custom interproscan.properties-file via a command line parameter
• set the only the path of the data directory by a parameter

[abretaud]

👍 that would be quite useful
Currently in the Galaxy tool we use this ugly trick = create a .interproscan-5/interproscan.properties file in a job specific HOME dir.