matlab: found indexing bug: should all like "if(all(r >= 1))"
matlab tests: better output, show dots for each test
make packages code cleanup
Merge pull request #119 from cbm755/ci_tests

update NEWS, reorganizing tests, other fixes
Tests: cleanup script a bit
dsolve: improve a bit, add tests, still needs work
python_cmd: reset the ipc mechanism if python raised error

Allows user to continue working after an error.

OctSymPy is not stateful: so this just spams stdout a bit and then
minor slowdown for next command.  In IPC system() it is overkill, but
harmless.

Fixes #79.  But I'm sure our error handling could still be improved.