Improve the warning when perf test hasn't been compiled
Style
Merge pull request #249 from edbaunton/better-perf-fail-warning

Better perf fail warning
Remove usage of 'uint' in linear_congruential_engine
Merge pull request #250 from kylelutz/fix-linear-congruential-engine

Remove usage of 'uint' in linear_congruential_engine
Update design.qbk

Correcting typo in sentence and adding in that OpenCL supports C as well as C++.
Merge pull request #253 from edbaunton/compute-design-doc

Update design.qbk