Fix GitHub URL (mistake in 7449bf26)

Fix mistake in 7449bf26e13ed201b578af8412596c36d95f7a7a
Remove replaces= variable
Remove unnecessary cd in package()
Use install variable for install script in sources array
Add changelog file to sources
Add md5sums
Fetch sources via git
Download install and changelog files if nonexistent
Release 1.1.0-3

- Remove use of replace= variable
- Update GitHub URL
- Fetch sources (including install script and changelog) from GitHub