Revert "A python_binary_create task, to bring pex-building under goal."

This reverts commit be65d80d1e7f573e447608d6fc8e3e395adc3957.
CI is failing in the same way as in the first iteration of this change.
Use os.path.normpath before os.path.basename

Testing Done:
[tw-mbp13-tdesai pants]$ ./pants tests/python/pants_test/base:address
Loading pants backends from source
Build operating on top level addresses: set([BuildFileAddress(tests/python/pants_test/base/BUILD, address)])
================================================================================ test session starts ================================================================================
platform darwin -- Python 2.6.7 -- py-1.4.20 -- pytest-2.5.2
plugins: cov, timeout
collected 3 items

tests/python/pants_test/base/test_address.py ...

============================================================================= 3 passed in 0.06 seconds ==============================================================================
tests.python.pants_test.base.address                                            .....   SUCCESS
[tw-mbp13-tdesai pants]$

Bugs closed: 209

Reviewed at https://rbcommons.com/s/twitter/r/499/
Updated pants script to clean after a failed attempt to bootstrap

Testing Done:
I've run 'build-support/clean.sh' and had it encounter an Untranslatable... kind of error.

On the next invocation, I see the output "Last bootstrap failed, cleaning up .pants.d" and the next bootstrapping succeeded.

Bugs closed: 213

Reviewed at https://rbcommons.com/s/twitter/r/501/
Third time's a charm?

A python_binary_create task, to bring pex-building under goal.
Fix ci.sh flags.
Revert "Third time's a charm?"

This reverts commit a9997c4d89d66022d86532101a56366e4a81cf3f.
A python_binary_create task, to bring pex-building under goal, Take 4.

Verified that travis-ci passes in a branch.
Fix java_agent

Testing Done:
yes locally,

[tw-mbp13-tdesai birdcage]$ head util/util-class-preloader/src/main/java/BUILD
java_agent(name='java',
  sources=rglobs('*.java'),
  premain='com.twitter.classpreloader.ClassPreloader',
  can_retransform=True
)
[tw-mbp13-tdesai birdcage]$

[tw-mbp13-tdesai birdcage]$ ./pants goal list ./util/util-class-preloader/src/main/java/::
util/util-class-preloader/src/main/java/BUILD:java
[tw-mbp13-tdesai birdcage]$

Bugs closed: 217

Reviewed at https://rbcommons.com/s/twitter/r/506/
Fix java_antlr_library target

Testing Done:
with this local changes on my laptop, the failing target now passes.

[tw-mbp13-tdesai birdcage]$ ./pants goal list ./eventbus/thrift/src/main/antlr/com/twitter/eventbus/thrift/tql/BUILD::
eventbus/thrift/src/main/antlr/com/twitter/eventbus/thrift/tql/BUILD:tql
[tw-mbp13-tdesai birdcage]$

Bugs closed: 215

Reviewed at https://rbcommons.com/s/twitter/r/503/
Rename PythonRunTests to PytestRun.

This is more informative and also more consistent with naming
in the JVM world (JUnitRun, SpecsRun).