Add a library with filesystem-related utilities
Add a library with filesystem-related utilities

The library offers these functions:
- mkdirRecursiveSync To create a directory and its ancestors
- escapeShellArg To escape parameters passed to shell commands
- directoryParser To allow easy processing of files and directories

matt9mg/concrete5,avdevs/concrete5,TimDix/concrete5,TimDix/concrete5,matt9mg/concrete5,MichaelMaar/concrete5,avdevs/concrete5,matt9mg/concrete5,MichaelMaar/concrete5,MichaelMaar/concrete5,avdevs/concrete5,TimDix/concrete5