Wcmatch

- **FIX**: In `glob`, avoid using up too many file descriptors by acquiring all file/folder names under a directory in
one batch before recursing into other folders.

- **NEW**: Add `wcmatch.pathlib` which contains `pathlib` variants that uses `wcmatch.glob` instead of the default Python glob.
- **NEW**: `escape` and `raw_escape` can manually be forced to use Windows or Linux/Unix logic via the keyword only argument by setting to `False` or `True` respectively. The default is `None` which will auto detect the system.
- **NEW**: The deprecated flag `FORCECASE` has now been removed.
- **NEW**: The deprecated functions `globsplit` and `fnsplit` have been removed.
- **NEW**: The deprecated variables `version` and `version_info` have been removed.

- **FIX**: Regression for root level literal matches in `glob`.
- **FIX**: Bug where `glob` would mistakenly abort if a pattern started with a literal file or directory and could not match a file or directory. This caused subsequent patterns in the chain to not get evaluated.

- **NEW**: Add `CASE` flag which allows for case sensitive paths on Linux, macOS, and Windows. Windows drive letters and UNC `//host-name/share-name/` portion are still treated insensitively, but all directories will be treated with case sensitivity.
- **NEW**: With the recent addition of `CASE` and `FORCEUNIX`, `FORCECASE` is no longer needed. Deprecate `FORCECASE` which will be removed at some future point.

- **NEW**: Drop Python 3.4 support.
- **NEW**: Add flags `FORCEWIN` and `FORCEUNIX` to force Windows or Linux/Unix path logic on commands that do not access the file system: `translate`, `fnmatch`, `filter`, `globmatch`, `globfilter`, etc. These flags will not work with `glob`, `iglob` or with the `WcMatch` class. It also will not work when using the `REALPATH` flag with things like `fnmatch`, `filter`, `globmatch`, `globfilter`.
- **FIX**: `glob` corner case where the first folder, if defined as a literal name (not a magic pattern), would not be treated properly if `IGNORECASE` was enabled in Linux.

- **NEW**: Add `WcMatch.is_aborted`.
- **FIX**: Remove deprecation of `kill` and `reset` in `WcMatch`. There are legitimate reasons to not deprecate killing via `kill` instead of simply breaking.
- **FIX**: If for any reason, a file exists, but fails "is directory" check, consider it as a file.