Release 0.9.20.

Release 0.9.19.

Add build instructions.

Reformat package.fig to work with internal fig-packages recipe.

Bugfix: duplicated constraints may allow incorrect dag build.

New boost build.

Merge pull request #6 from gburca/master

Add gcc 8.1.0 and remove 5.2 and 4.9.2

Support GCC 7.2.0 instead of GCC 7.1.0

Suport gcc 7.1.0 (for DRW builds)

Use provided ostream for dag logging, allow to log dag from any CcsCo…

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