Fix Invoke-FuzzyEdit with directory

- Invoke-FuzzyEdit prepends directory to file list
- Resolves kelleyma49#67

Fix preview issue with paths that have spaces

Tab complete for unmatched strings

- makes behavior more similar to fzf-tab

Properly includes the helpers script

- Resolves kelleyma49#64

Invoke-PsFzfGitHashes() improvements

- don't show graph
- show colors if running in Windows Terminal
- matching works regardless of hash length
- remove border for Invoke-PsFzfGitFiles(0

Preview enhancements

- only run Get-Help on non-applications
- show git log on directory preview

Account for more versions of the version str

- Strings like '0.24', '0.24.1', '0.24.1 (devel)' will be parsed
  properly

Use PSReadLine history

- Invoke-FuzzyHistory uses PSReadLine history, if available

Fix linux/mac extension

Update Tab Expansion documentation