Alive-progress

- soft wrapping support
- hiding cursor support
- Python logging support
- exponential smoothing of ETA time series
- proper bar title, always visible
- enhanced times representation
- new `bar.text()` method, to set situational messages at any time without incrementing position (deprecates 'text' parameter in `bar()`)
- performance optimizations

- fix compatibility with Python 2.7 (should be the last one, version 2 is in the works, with Python 3 support only)

- standard_bar accepts a `background` parameter instead of `blank`, which accepts arbitrarily sized strings and remains fixed in the background, simulating a bar going "over it"

- restructure internal packages
- 100% branch coverage of all animations systems, i.e., bars and spinners

- protect configuration system against other errors (length='a' for example)
- first automated tests, 100% branch coverage of configuration system

- sanitize text input, keeping '\n' from entering and replicating the bar on the screen