Add movielens dataset. Forgot to add it in previous commit.
Merge branch 'master' of github.com:ntnu-smartmedia/goldfish

# By Dag Einar Monsen
# Via Dag Einar Monsen
* 'master' of github.com:ntnu-smartmedia/goldfish:
  Add movielens dataset. Forgot to add it in previous commit.
Replace ml10M zip with gzip.
Merge branches 'master' and 'master' of github.com:ntnu-smartmedia/goldfish

# By Dag Einar Monsen
# Via Dag Einar Monsen
* 'master' of github.com:ntnu-smartmedia/goldfish:
  Replace ml10M zip with gzip.

# By Dag Einar Monsen
# Via Dag Einar Monsen
* 'master' of github.com:ntnu-smartmedia/goldfish:
  Replace ml10M zip with gzip.
Changed to 1m dataset
Added .metadata/ to gitignore
Replace movielens-1m data with gzipped version.
Fix movielens 10m dataset. Add movies and tags, movie ratings into separate dir.
Remove logback dependency. It caused collision with SLF4J. Fix paths to new dataset.
Created a generic user-based collaborative filtering algorithm
Added item-based recommender and slope one recommender
Added evaluation, and changed name from Main to Mahout
Added support for both threshold- and nearestNneighborhood.
Moved all system prints to the bottom
Added precision and recall
P&P hopefully works
Small fixes
Minor changes
Rewrite evaluation architecture.

Doing this in a single commit because the previous code is pretty much replaced.
Merge branch 'reorganize-for-evaluation'

* reorganize-for-evaluation:
  Rewrite evaluation architecture.

Conflicts:
	src/edu/ntnu/idi/Evaluation.java
	src/edu/ntnu/idi/Mahout.java