CTEST_CUSTOM_* parameter have to be put in a CTestCustum.cmake file which itself has to be in the build directory

(inspired by a question on IRC)

The pfirst hack is needed also on msvc 2010 as it gets completely nuts, even though it doesnt segfault as msvc 2008 did

back out changeset f77ed291f8f0. It turns out that the SSE3 header is always included, even without any SSE enabled, so it was making us wrongly use SSE3 paths. Backing this out fixes msvc related crashes, at least bug 165.

fix memory leak (when conservatively resizing vectors of dynamically allocated scalar types such as bugnums)

now random<integer types> spans over 0..RAND_MAX, or -RAND_MAX/2..RAND_MAX/2 for signed types, or the most significant bits for smaller integer types.

fix unit tests for integer types in preparation for next changeset making random<int> span over a much bigger range