TINY, little initial commit with the 4 map-reducers tasks. We should start make smaller commits ;).
Added some data samples on flights data.
IMPORTANT CHANGE IN DATA FORMAT. Now that i have your attention, simply removed unnecesary " that were messing the data loading.

We should probably ask some questions about this, as we are specifically asked not to
modify this files on the hadoop cluster. We may need to copy the files
with this format "bug", or handle the loading with a special function or
something :(.
Metric 5? Checked. Tested on hadoop cluster? Not yet. Tomorrow never dies. And the night is dark and full of terrors ;).
Added Rank.jar and corrected a few things in metric 5
PIG 9 to 11
pig done :)
Added metric 6, 2nd metric of hive.
junit tests
Agregadas las dependencias para cobertura.
Added carriersPath as parametrizable input, plus several other final tiny fixes.
Added 2 optionals extra mapreducers.