Adding Mavericks support to OS X bootstrapping script
Modify so that get_about_memory.py can hook to other program
Merge pull request #333 from ypwalter/get_about_memory

Modify so that get_about_memory.py can hook to other program
Merge pull request #330 from eliperelman/mavericks-bootstrap-support

Bug 982929 - Bootstrapping process fails on OS X 10.9 Mavericks
Bug 935776: fix bootstrapping on Mac Mavericks

* don't prompt for gcc-4.6 and MacSDK10.6 on Mavericks
* prompt for gnu-tar if no compatible archiver is found