Workaround

Added checking for empty model nodes.
Something can be wrong we neo4j. We
will return to this problem if it occurs
again
Minor refactors
Fix urls that aren't any feeds (mentioned in #103)
Terminating master and slave as an config param

Now master and slave Spidercrabs are looping. If there is need to
terminate them after work is done - use `"terminate_on_end": 1` parameter
in config.json.
Fix typo in keyword
Merge remote-tracking branch 'origin/ocean_don_corleone' into spidercrab
get_my_node_id() in Spidercrab _init_config()
spidercrab_1000_test.py
Spidercrab testing (and running) without Corleone

Add --no-corleone option to spidercrab scripts.
Spidercrab and spidercrab_1000_test.py minor fixes
Spidercrab simple stats and their usage

Related to tasks #106 and #103.
Copy of small exemplary data script
Content type filter, spidercrab master threading

Implemented a filter of supported content types. Spidercrab master has
now an ability to run in threads. Related to: #106 and #103.
Fix lack of uuid in Content nodes...
i06t03 and i06t07 - Spidercrab master and slave

Improved Spidercrab master and slave functionalities:
* Fix bug of loop in recursion of finding another content source when a
particular source is no longer available on given url
* Improved _news_is_supported() method
* Fixed Corleone config fetching for command line options inside
spidecrab init scripts
* Add logging stats into json file inside logs/ directory
* Add -t option (for stats exporting) to spidercrab init scripts

This commit closes tasks #103 and #106.
Add stub_for_mantis_kafka_push() in Spidercrab

Related to task #105.
Passing the tests/spidercrab_1000_test.py
Merge pull request #118 from OceanVision/spidercrab

Spidercrab: i06t02, i06t03, i06t04, i06t07