added a test that should fail without constructor changes
adds to the preconditioner API to address the reasonable change of internal behavior introduced in #978. adds a test that fails without this update as was being seen in cyclopts unit tests. should fix the nightly issue
removed errant cout
made solver construction more readable
Merge branch 'cyclopts' of github.com:gidden/cyclus into gidden-cyclopts
added some docs to the solver constructor
Merge branch 'cyclopts' of github.com:gidden/cyclus into gidden-cyclopts
Merge branch 'gidden-cyclopts' into develop
make all Arc usage const Arc* and create static reusable arc pool
get tests to compile with Arc* and pool
add tcmalloc optional link to cmakelists