Adjust gcc/clang warnings
Add all external test cases to Jamroot
ICC has problems with these tests.
MPL errors (?!) and numerical errors (probably due to optimization)
Remove OpenMP system function wrapper.
Not very useful and doesn't cover all forms.
Reorganize OpenMP algebra and state. #5 #6 #7
openmp_range_algebra: parallel for over a random access container.
openmp_nested_algebra: processs parts of a split container in parallel.
openmp_state: a split container based on vector<vector<>>.
openmp_algebra: use a range_algebra on each part of that container.
Update Lorenz ensemble sample to new OpenMP algebra
1D-chain performance test. #3
Based on <https://github.com/mariomulansky/hpx_odeint/tree/9792ca4f330bf0cffde4f000e900fb4c1c254891/osc_chain_1d/openmp2>

Use osc_chain_speedup.{sh,gnu} to compute and plot speedup.
"split" uses openmp_state/openmp_algebra;
"simple" uses vector/openmp_range_algebra