Fix warnings in 'python setup.py develop' run
Delete useless test classes
Convert 'saveload_test.py' to use with 'pytest' framework
Convert 'PointInfo_test' to use with 'pytest' framework
Convert 'impfn_test' to use with 'pytest' framework
Increase 'PointInfo' test coverage
Convert 'dopri_event_test' to use with 'pytest' framework
pytest: ignore not converted test scripts
Include 'Toolbox/optimizers' tests in testsuite

Fix evident failures. Mark mysteriously failing test as 'notrun'
Convert 'radau_event_test' to use with 'pytest' framework
Merge identical 'Events' tests for Radau and Dopri in one file
Merge 'imp_load_test.py' in test for ImplicitFnGen
Convert 'numeric_diff_test' to use with 'pytest' framework
Implement warnings checks
Add event test for Vode. Change file name accordingly
Remove '-m32' compile flag in Dopri/Radau

This fixes tests on Travis CI which uses Ubuntu 12.04 64 bit.
Extract tests from 'Toolbox/dssrt.py'

Tests (or code) are to be fixed. Mark them as failing.
Convert basic generators tests to use with 'pytest' framework
Convert 'funcspec_tests' to use with 'pytest' framework

Tests (or code) are to be fixed. Mark them as failing
Make it possible to run tests without 'matplotlib' installation