parser, engine: Fixes in parser and engine

- Bug in engine.parse_command_line() with dying local node object fixed
- Parser now correctly grabs urls with http in the beginning
parser: Check for NULL href added
test: feed_pipeline now is crawling recursively
Merge pull request #3 from IIoTeP9HuY/processors

Parser fixed. Bug in engine fixed. Feed_pipeline application can crawl recursively now.