GitLab

Comments changes, no functionality changes. 

code merge

Implements the timestamp attribute for the testsuites element in the output XML (external contribution by Dirk Meister).

Implements a subset of TR1 tuple needed by gtest and gmock (by Zhanyong Wan); cleaned up the Python tests (by Vlad Losev); made run_tests.py invokable from any directory (by Vlad Losev).

Makes the Python tests more stable (by Vlad Losev); fixes a memory leak in GetThreadCount() on Mac (by Vlad Losev); improves fuse_gtest_files.py to support fusing Google Mock files (by Zhanyong Wan).

Cleans up death test implementation (by Vlad Losev); changes the XML format to be closer to junitreport (by Zhanyong Wan).

* changes the XML report format to match JUnit/Ant's.
* improves file path handling.
* allows the user to disable RTTI using the GTEST_HAS_RTTI macro.
* makes the code compile with -Wswitch-enum.

Makes the Python tests more portable by calling standard functions to interpret the result of os.system().  This could fix the broken Python tests on some users' machines.