Added an option to build a dynamic library

[lostmsu]

fixes #17

[basilgello]

Thanks for the PR! Some further things need to be done prior to merging it:

• Replace panics with proper error code returns (I am doing it now in separate PR)
• Add ability to pass logger instance

[lostmsu]

@basilgello I realized also cancellation is needed in some C-compatible form.

[basilgello]

Yes, and split configuration part from driver…