MAHOUT-1565 Remove mapreduce-job-specific MAHOUT_OPTS (nishkamravi via gcapan): this closes apache/mahout#4
MAHOUT-1561, MAHOUT-1568, MAHOUT-1569 text-delimited Spark readers and writers with drivers and a CLI for 'spark-itemsimilarity' closes apache/mahout#22
disabled ItemSimilarity test until we can work out how to run them without MAHOUT_HOME and SPARK_HOME being set
MAHOUT-1541, MAHOUT-1568, MAHOUT-1569 fixed a build test problem, drivers have an option new to not search for MAHOUT_HOME and SPARK_HOME
Merge branch 'master' of https://git-wip-us.apache.org/repos/asf/mahout
MAHOUT-1541 backed out compatability with legacy Item Similarity, now outputs raw LLR scores
MAHOUT-1500: Implement H2O backend for Mahout Scala DSL

Barebone only, no logic yet. Compiles, tests fail with NotImplementedError

Signed-off-by: Anand Avati <avati@redhat.com>
MAHOUT-1500: Implement non-operator parts of H2O bindings

Signed-off-by: Anand Avati <avati@redhat.com>
MAHOUT-1500: Implement non Linear Algebra ops in H2O backend

i.e, mapBlock() and rowRange()

Provide dummy methods for all operators

Signed-off-by: Anand Avati <avati@redhat.com>
MAHOUT-1500: Implement Linear Algebra ops in H2O backend

- A'
- A'A
- A'B
- AB'
- A (element-wise) B
- A (element-wise) Scalar
- AinCoreB
- Ax
- Atx

All MathSuite tests are passing.

Signed-off-by: Anand Avati <avati@redhat.com>
MAHOUT-1500: Add String key support to DRM

Strings are stored in a Vec along with Frame in CheckpointedDrm

Signed-off-by: Anand Avati <avati@redhat.com>
MAHOUT-1500: Implement Par() operator

Signed-off-by: Anand Avati <avati@redhat.com>