Fix inheritance issue with GlobalFixture

GlobalFixture's destructor was not marked as virtual so inheriting from
it would didn't correctly cleanup the Inherited GlobalFixture
Merge pull request #69 from yazug/fix_GlobalFixture_inheritance

Fix inheritance issue with GlobalFixture
Updating virtualenv.py bootstrap script (1.9.1)
Disabling downloads

I'm not sure this will work ...
Merge branch 'master' of https://github.com/CxxTest/cxxtest
Reverting last change.

We need to download pip.
Updating LGPL version and doc reference.
Resolving issue #53

Changing try/catch logic within TS_ASSERT_THROWS to properly
catch std::exception without generating compiler warnings.
Resolving #65

There was a reference made to 'max int', which I haven't
tried to address here.
Resolving #70

I used a slightly different format (for readability),
but the effect is the same.

I also added a test to verify that the --world option has the
desired effect.
Adding output files used in documentation.
Documentation updates

These reflect the previous commit.
Final commit for CxxTest 4.2
Fixing document tests

1. Updated tester to validate lines with "Running" in them.

2. Updated corresponding baselines due to change in the
CxxTest output.
Updating runner13 baseline files.
Misc documentation update
Cache compiler tests and print a summary
Format change in announcement.
Updating copyright documentation in source files.
Tagging CxxTest 4.2.1