Increment python debugger minor version.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118806795

Increment open source Python debugger version.

-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=118369689

Fix build errors due to import order.

Parse __init__.py to find the version number instead of loading googleclouddebugger in setup.py. The native dependencies get built as part of the last stage of setup, so it's not safe to import the library anywhere in setup.py.
-------------
Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=113971723

Merge branch 'master' into moe_writing_branch_from_01e20d5463a1f5b291…

…5b9d66bd4cabd7a5f9fb1c

Update Python Cloud Debugger to v1.5

Change build.sh to be executable