Merge pull request #696 from woggle/executor-env

Pass executor env vars (e.g. SPARK_CLASSPATH) to compute-classpath.sh
Merge pull request #691 from karenfeng/logpaging

Create log pages
Merge pull request #697 from pwendell/block-locations

Show block locations in Web UI.
changing com.google.code.findbugs maven coordinates
Increase PermGen size
Merge pull request #698 from Reinvigorate/sm-deps-change

changing com.google.code.findbugs maven coordinates
Add `Environment` tab to SparkUI.

This adds a tab which displays system property and classpath information. This
can be useful in debugging various types of issues such as:

1. Extra/incorrect Hadoop jars being included in the classpath
2. Spark launching with a different JRE version than intended
3. Spark system properties not being set to intended values
4. User added jars that conflict with Spark jars
Merge remote-tracking branch 'origin/pr/662'

Conflicts:
	bin/compute-classpath.sh
Merge branch 'master' of github.com:mesos/spark
Fixed a delay scheduling bug in the YARN branch, found by Patrick
Determine Spark core classes better in getCallSite
Cosmetic fixes to web UI
Some optimizations to loading phase of ALS
Fix a comment
add spaces before curly braces  and after for if conditions
Responding to Matei's review
Merge pull request #699 from pwendell/ui-env

Add `Environment` tab to SparkUI.
Merge pull request #689 from BlackNiuza/application_status

Bug fix: SPARK-796
Make number of blocks in ALS configurable and lower the default
Merge branch 'master' of github.com:mesos/spark