Adding package for dmd.
Fixing extract dir for dmd.
Adding post_install script for dmd.
Adding vs prefix selection to dmd post_install script.
Converting tabs to spaces.
Adding vsprefix replacement for dmd ini file.
Adding vs install path to dmd install.
Adding windows sdk path to dmd install.
Extracting dmd src dir during installation.
Removing trailing backslashes from dmd ini paths.