ae.utils.graphics.draw: Fix compilation with DMD 2.065
ae.sys.file: Add recreateEmptyDirectory
ae.sys.file: Add createNamedPipe, connectNamedPipe

Currently implemented only for Windows.
ae.sys.git: Allow Repository construction without .git
ae.sys.git: Add repositoryNameFromURL
ae.sys.git: Add getObjects, writeObjects, createObjectWriter, etc.