Add hive test files to repository.  Remove download script.

This PR removes our test dependence on files hosted at Berkeley by checking the test queries and answers into the repository.  This should also fix the maven Jenkins build.

I realize this is a *giant* commit.  But size wise its actually pretty small.  We are only looking at ~1.2Mb compressed (~30Mb uncompressed).  Given that we already have a ~80Mb file permanently added to the spark code lineage, I do not think that this will change the developer experience significantly.

Furthermore, I think it is good engineering practice to consider such test support files as "code", since changes to them would indicate a change in functionality.  These files were only excluded from the initial PR as I wanted the diff to be readable.

Author: Michael Armbrust <michael@databricks.com>

Closes #199 from marmbrus/hiveTestFiles and squashes the following commits:

b9b9b17 [Michael Armbrust] Add hive test files to repository.  Remove download script.
SPARK-1279: Fix improper use of SimpleDateFormat

`SimpleDateFormat` is not thread-safe. Some places use the same SimpleDateFormat object without safeguard in the multiple threads. It will cause that the Web UI displays improper date.

This PR creates a new `SimpleDateFormat` every time when it's necessary. Another solution is using `ThreadLocal` to store a `SimpleDateFormat` in each thread. If this PR impacts the performance, I can change to the latter one.

Author: zsxwing <zsxwing@gmail.com>

Closes #179 from zsxwing/SPARK-1278 and squashes the following commits:

21fabd3 [zsxwing] SPARK-1278: Fix improper use of SimpleDateFormat
Make SQL keywords case-insensitive

This is a bit of a hack that allows all variations of a keyword, but it still seems to produce valid error messages and such.

Author: Matei Zaharia <matei@databricks.com>

Closes #193 from mateiz/case-insensitive-sql and squashes the following commits:

0ee4ace [Matei Zaharia] Removed unnecessary `+ ""`
e3ed773 [Matei Zaharia] Make SQL keywords case-insensitive
Add asCode function for dumping raw tree representations.

 Intended only for use by Catalyst developers.

Author: Michael Armbrust <michael@databricks.com>

Closes #200 from marmbrus/asCode and squashes the following commits:

7e8c1d9 [Michael Armbrust] Add asCode function for dumping raw tree representations.  Intended only for use by Catalyst developers.
Fix to Stage UI to display numbers on progress bar

Fixes an issue on Stage UI to display numbers on progress bar which are today hidden behind the progress bar div. Please refer to the attached images to see the issue.
![screen shot 2014-03-21 at 4 48 46 pm](https://f.cloud.github.com/assets/563652/2489083/8c127e80-b153-11e3-807c-048ebd45104b.png)
![screen shot 2014-03-21 at 4 49 00 pm](https://f.cloud.github.com/assets/563652/2489084/8c12cf5c-b153-11e3-8747-9d93ff6fceb4.png)

Author: Emtiaz Ahmed <emtiazahmed@gmail.com>

Closes #201 from emtiazahmed/master and squashes the following commits:

a7964fe [Emtiaz Ahmed] Fix to Stage UI to display numbers on progress bar
Merge branch 'master' of https://github.com/apache/spark into SPARK-1127
Move writer.close() to finally block.
Add documents.