Torso of crawler
Fixed some issues introduced during problematic merge
Basic optparser engaged
Renamed sites => plugins
Some work of layout of apollo/crawles plugins
Simplest working walking skeletonw of Crawler, see firmy_rb
Basic implementation of HackerNews crawler plugin
First steps with walking skeleton

Automatically run all plugins if no specified
Basic implementation of base plugin class
Cosmetics of HackerNews apollo plugin
Improved build process - run tests during the build:ci
Basic implementation of firmy.cz crawler
Print a href link in results of hacker news crawler
Result is splitted to title and url
For testing purposes created slashdot plugin

I wanted to see how easy-to-use the architecture is, to make it simplest but no simpler
Changed cmd-line behaviour

New usage:

```
Usage: main [options]
    -h, --help                       Display this screen
    -a, --all                        Run all plugins
    -v, --verbose                    Enable verbose output
    -l, --list-plugins               List of plugins

```

If no options is specified help screen is shown
More friendlier command line
Create README.md
Update apps/crawler/README.md
Update apps/crawler/README.md
Update apps/crawler/README.md
Update apps/crawler/README.md