state: bring back the function to read old evolvestate files
Before introduction of this nice cmdstate file wrapper, we had individual
methods to write data to evolvestate file. Let's bring back the function which
used to read data from the old evolvestae file so that we can use it in next
patch for BC purposes.
syntax: re
/figures/[^/]+\.png$
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
^tests/.*\.err$
^tests/easy_run.sh$
^build/
^dist/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$
tests/\.testtimes
^docs/training/graphs/
^docs/training/html/
^docs/training/index.html
^docs/training/graphviz-images/
^docs/training/img/
^docs/training/output/
^docs/training/pandocfilters/