Merge pull request #552 from martinjaggi/master. Closes #552.

tex formulas in the documentation

using mathjax.
and spliting the MLlib documentation by techniques

see jira
https://spark-project.atlassian.net/browse/MLLIB-19
and
https://github.com/shivaram/spark/compare/mathjax

Author: Martin Jaggi <m.jaggi@gmail.com>

== Merge branch commits ==

commit 0364bfabbfc347f917216057a20c39b631842481
Author: Martin Jaggi <m.jaggi@gmail.com>
Date:   Fri Feb 7 03:19:38 2014 +0100

    minor polishing, as suggested by @pwendell

commit dcd2142c164b2f602bf472bb152ad55bae82d31a
Author: Martin Jaggi <m.jaggi@gmail.com>
Date:   Thu Feb 6 18:04:26 2014 +0100

    enabling inline latex formulas with $.$

    same mathjax configuration as used in math.stackexchange.com

    sample usage in the linear algebra (SVD) documentation

commit bbafafd2b497a5acaa03a140bb9de1fbb7d67ffa
Author: Martin Jaggi <m.jaggi@gmail.com>
Date:   Thu Feb 6 17:31:29 2014 +0100

    split MLlib documentation by techniques

    and linked from the main mllib-guide.md site

commit d1c5212b93c67436543c2d8ddbbf610fdf0a26eb
Author: Martin Jaggi <m.jaggi@gmail.com>
Date:   Thu Feb 6 16:59:43 2014 +0100

    enable mathjax formula in the .md documentation files

    code by @shivaram

commit d73948db0d9bc36296054e79fec5b1a657b4eab4
Author: Martin Jaggi <m.jaggi@gmail.com>
Date:   Thu Feb 6 16:57:23 2014 +0100

    minor update on how to compile the documentation
Merge pull request #454 from jey/atomic-sbt-download. Closes #454.

Make sbt download an atomic operation

Modifies the `sbt/sbt` script to gracefully recover when a previous invocation died in the middle of downloading the SBT jar.

Author: Jey Kottalam <jey@cs.berkeley.edu>

== Merge branch commits ==

commit 6c600eb434a2f3e7d70b67831aeebde9b5c0f43b
Author: Jey Kottalam <jey@cs.berkeley.edu>
Date:   Fri Jan 17 10:43:54 2014 -0800

    Make sbt download an atomic operation
Merge pull request #561 from Qiuzhuang/master. Closes #561.

Kill drivers in postStop() for Worker.

 JIRA SPARK-1068:https://spark-project.atlassian.net/browse/SPARK-1068

Author: Qiuzhuang Lian <Qiuzhuang.Lian@gmail.com>

== Merge branch commits ==

commit 9c19ce63637eee9369edd235979288d3d9fc9105
Author: Qiuzhuang Lian <Qiuzhuang.Lian@gmail.com>
Date:   Sat Feb 8 16:07:39 2014 +0800

    Kill drivers in postStop() for Worker.
     JIRA SPARK-1068:https://spark-project.atlassian.net/browse/SPARK-1068