Only delete the installation folder if it is empty

Prevents deleting stuff added by end users in the root of the installation folder.
Merge pull request #37 from eco/patch-5

Only delete the installation folder if it is empty
copy ini files from dmd folder
filter out all .git files when doing a versioned copy
Merge branch 'dmd_ini' into merge_fixes
Merge branch 'fixGitIgnore' into merge_fixes

Conflicts:
	create_dmd_release/create_dmd_release.d