Mathext

What's changed?
- Improved the `prime` function.

What's new?
- Fixed `shapesides` runtime error
- Added more error catches to `circleconvert`
- Fixed `nothing` Python 2.7 runtime error
- Fixed `fib` runtime bug and simplified function
- Simplified `convertbase`
- Fixed `flipcoords` calculation error and simplified function

Any breaking changes?
- `flipcoords` now returns a `tuple` instead of a `string`. As a workaround, use `str(flipcoords(x, y, axis)[0]) + ", " + str(flipcoords(x, y, axis)[1])`

Anything else?
- 100% code coverage achieved!

What's changed?
- Removed unneeded `else` after `return` in `hcf` function.

What's new?
- Fix fracsimplify returning `"1/1"` and instead return `(1, 1)`
- Fracsimplfy now returns a tuple
- Update `hcf` function to use preexisting implementations
- Added `getprime` function
- Update lcm function
- `num` accepts more number types

Any breaking changes?
- Removed `ready` constant.
- Removed `about` constant.

Anything else?
- Shortened posneg
- Removed obsolete if bool conversions

> Some listed changes courtesy of Reddit users [robin-gvx](https://www.reddit.com/r/Python/comments/agkbhw/python_library_that_extends_the_default_math/ee7k9mm/) and [XNormal](https://www.reddit.com/r/Python/comments/agkbhw/python_library_that_extends_the_default_math/ee71idf/).

This is the very first release of Mathext. Future versions will display changelogs here.