[SPARK-1876] Windows fixes to deal with latest distribution layout changes

- Look for JARs in the right place
- Launch examples the same way as on Unix
- Load datanucleus JARs if they exist
- Don't attempt to parse local paths as URIs in SparkSubmit, since paths with C:\ are not valid URIs
- Also fixed POM exclusion rules for datanucleus (it wasn't properly excluding it, whereas SBT was)

Author: Matei Zaharia <matei@databricks.com>

Closes #819 from mateiz/win-fixes and squashes the following commits:

d558f96 [Matei Zaharia] Fix comment
228577b [Matei Zaharia] Review comments
d3b71c7 [Matei Zaharia] Properly exclude datanucleus files in Maven assembly
144af84 [Matei Zaharia] Update Windows scripts to match latest binary package layout

1 files changed, 4 insertions, 3 deletions

diff --git a/README.md b/README.md
index 9c2e32b90f..6211a5889a 100644
--- a/README.md
+++ b/README.md
@@ -9,13 +9,14 @@ You can find the latest Spark documentation, including a programming
 guide, on the project webpage at <http://spark.apache.org/documentation.html>.
 This README file only contains basic setup instructions.
 
-
 ## Building Spark
 
 Spark is built on Scala 2.10. To build Spark and its example programs, run:
 
     ./sbt/sbt assembly
 
+(You do not need to do this if you downloaded a pre-built package.)
+
 ## Interactive Scala Shell
 
 The easiest way to start using Spark is through the Scala shell:
@@ -41,9 +42,9 @@ And run the following command, which should also return 1000:
 Spark also comes with several sample programs in the `examples` directory.
 To run one of them, use `./bin/run-example <class> [params]`. For example:
 
-    ./bin/run-example org.apache.spark.examples.SparkLR
+    ./bin/run-example SparkPi
 
-will run the Logistic Regression example locally.
+will run the Pi example locally.
 
 You can set the MASTER environment variable when running examples to submit
 examples to a cluster. This can be a mesos:// or spark:// URL,