Improve output format, now has one file per station.
Optimized download

Now it only ask to download for files that are on the FTP server for
sure.
Output results for the same period of time in the same file (useful for easier data visualization)
Change in the input list format

Now the input file must list stations ID and not filenames. Filenames
are deducted from stations ID and the year given.
Implemented gridded temperature Anomalies.
First commit

From 1977 to 2013, it uncompress all the gzip files, merge them, and
compress the merged file in a gzip.
Complete rewrite of the mapreduce to build gridded anomalies dataset.
Improve gridded temperature anomalies computations.
Improved algorithms, now compute min and max temperature anomalies and check if the anomaly is extreme.
Fix grid coordinates computation. Now always return top-left corner of the cell.
Now possible to adjust temporal granularity (day or month).
Few fixes.
Now base extreme event selection on centiles. More stats.
Replace old napred by the new one.
Complete refactoring. No more specific to temperature, can be used with any data.
Clean output.
Rename package
Fix grid cells coordinates computations.
Rename ncdcDatRetrieval_1975-2002.sh to ncdcDataRetrieval_1975-2002.sh
Merge pull request #32 from weatherTeam/iss2/temperatureAnomalies

Iss2/temperature anomalies