Also consolidate install.sh with download.sh;
remove unnecessary files;
create README.md in install.
Ran dos2unix tool to cleanup extra carriage returns at the end of lines
- .NET Core RID suffixes removed
- `el7.centos` suffix added to RPM
- `1ubuntu1.14.04.1` iteration used for DEB packages
`~` cannot be used after `ubuntu1` because GitHub release renames it to
a `.`; additionally, no packages lack the final suffix `.1`. While my
machine is `.5` I could find no packages that went past `.3`, so let's
use this to indicate that it works for `14.04.1` and forward.
We are *not* recreating the alpha.9 packages, but will we rename them
accordingly. This means that the filenames will be "correct" but the
meta-data will be out-of-date.
