Fix TaskPath import in thermos binary

Testing Done:
[tw-172-25-27-94 aurora (jsmith/wat)]$ ./pants ./src/test/python/apache/thermos/bin:all
Build operating on targets: OrderedSet([PythonTestSuite(src/test/python/apache/thermos/bin/BUILD:all)])
=============================================================== test session starts ================================================================
platform darwin -- Python 2.7.3 -- pytest-2.5.1
collected 0 items / 1 errors

====================================================================== ERRORS ======================================================================
_______________________________________ ERROR collecting src/test/python/apache/thermos/bin/test_thermos.py ________________________________________
src/test/python/apache/thermos/bin/test_thermos.py:1: in <module>
>   from apache.thermos.bin import thermos
/var/folders/kk/_7jrv7jd0095tg5x9w1qd8mw0000gp/T/tmpIWqDim/apache/thermos/bin/thermos.py:21: in <module>
>   from apache.thermos.common.path import TkPath
E   ImportError: cannot import name TkPath
============================================================= 1 error in 0.09 seconds ==============================================================
src.test.python.apache.thermos.bin.test_thermos                                 .....   FAILURE

# updated import statement

[tw-172-25-27-94 aurora (jsmith/wat)]$ ./pants ./src/test/python/apache/thermos/bin:all
Build operating on targets: OrderedSet([PythonTestSuite(src/test/python/apache/thermos/bin/BUILD:all)])
=============================================================== test session starts ================================================================
platform darwin -- Python 2.7.3 -- pytest-2.5.1
collected 0 items

=================================================================  in 0.15 seconds =================================================================
src.test.python.apache.thermos.bin.test_thermos                                 .....   SUCCESS

Bugs closed: AURORA-26

Reviewed at https://reviews.apache.org/r/16762/
Change name of client console script to aurora.

Reviewed at https://reviews.apache.org/r/16797/