Add build info for OSX.
Improve error message.
Rename README for OSX.
Simple adjustments to perf profiles.
New simpler profile tool.
Merge branch 'pprof_noma' into develop
New licensing: LGPLv3.
Add target to LGPL icon.
Adjust dominating performance profile.

If a solver consistently dominates the others, its ratio array is
constant. This causes no horizontal line to appear on the plot. Fix this
by moving the last abscissa to xmax.
Adjust dominating performance profile.

If a solver consistently dominates the others, its ratio array is
constant. This causes no horizontal line to appear on the plot. Fix this
by moving the last abscissa to xmax.
Fix bug in vertical range of pprof2.
Draw tail in perf profiles.
Draw tail in perf profiles.
Improvements to pprof2.

- Now returns a set of axes instead of showing the plot,
- make sure to create a fresh set of axes at each call.
Simplify trust region class.
Cosmetic changes in Trunk.
Remove unused attribute in Trunk.
Merge branch 'trunk'
Smarter colormaps in performance profiles.
Improve choice of grays in profiles.