Added possibility to plot a list of refcases in different colors.
Added files
Started work on robustifying util_abort for shared libraries
Completed util_abort rewrite
Factored out function util_fprintf_backtrace
dladdr() can return success - but the symbol name can still be NULL
Moved abort() outside of abort_mutex critical region
Merge branch 'master' into refplot
Removed the filereadfunction from plot-library to plot_config.c
Merge branch 'master' into refplot
changed to ecl_sum_fread_alloc_case()
Merge branch 'master' into refplot
The handling of refcases for plotting is now fully taken care of in plot_config. All refcases are read and cashed on demand.
Merge pull request #36 from myrseth/refplot

Refplot
Added isinstance test on stringlist_test
Merge branch 'master' of github.com:Ensembles/ert
Merge branch 'util-abort-dladdr'