Add two tests

[Yiqing-Gu]

Add two test for convex Hull and end point property.

[magicbycalvin]

1. Please move the tests out of the Examples directory and move them all into the Tests directory.
2. The convex hull test is checking whether something is equal to itself. That will need to change. You should randomly sample several points along a polynomial and then check that each of those points falls within the convex hull. If they all do, then you can say the tests passes.
3. I'd like to see more randomness included in the testing. While deterministic tests are good, you should also include randomness so that we can explore edge cases that we may have forgotten about as well.
4. Use different values for initial times as well. The times shouldn't affect anything, but it's good to test and make sure that they don't.

[Yiqing-Gu]

• Test files were moved to test directory
• New tests for convex hull
• Added more randomness into both tests
• Added different values in initial times
• Test files were unified into one file for each test
• Timing test needs to be debug, it will be online later.

[magicbycalvin]

1. Please also include random end points in the end points test.
2. Tests shouldn't have to be commented/uncommented, please make sure that all tests will run without the user needing to interact with the code directly. Assume that the user will not ever open the files with the test code, rather they will simply run pytest to verify that changes they make do not break the library.
3. We don't want a timeout for timing tests, I would like to see an output that shows how long the process took. If that doesn't fit within the pytest framework, that is fine. We can simply add a timing_analysis example in the examples folder.