shore: updated Task schema version

Added OPML import support.

Added parameter of minimal interval between requests to same domain to avoid flood.
Removed global state log from the library, log is passed as parameters.
Fixed test. Added OPML test.
Moved screenshot images out of library directory.
Changed flags to be more verbose.
Simplified CTRL+C to exit code.
Other refactorings.
Update() is still way too convoluted and could be broken down a bit.

minor improvements, no breaking changes

alpha release