* Closes #135, #165 * Add a 'Summary' section at the top of the Readme explaining the scope of requests-cache and why you would want to use it * Add some more info explaining the difference between using `CachedSession` directly vs. patching with `install_cache()` * Move basic examples from 'User Guide' section into Readme * Include Readme in Sphinx docs (using `.. mdinclude::`) and remove duplicate sections * Include Contributing guide in Sphinx docs * Convert History doc to markdown and include in Sphinx docs * Use `automod` options to move main cache documentation from `CacheMixin` back to to `CachedSession`, since that's probably where a user will look first * Add more detailed usage examples to an 'Advanced Usage' section for `CachedSession` options (`filter_fn`, `ignore_parameters`, etc.) * Update example scripts and move them to `examples/` folder