Sorry for the delay on the release, we had to catch several technical issues next to OSMC.
We decided to split the releases into Icinga Core and Icinga Web. Therefore you will find two several packages to download and install.
The Core contains the Icinga API and IDOUtils which are needed for a functional Web this time. Make sure to download Icinga 1.0 RC1 and install it with IDOUtils for MySQL, the API will be installed automatically in share/icinga-api/
The Icinga Web depends on the API – you have to point the config to the actual install path. There are also several prerequisites and dependencies to resolve, so please catch on the instructions in doc/install-fromscratch.txt and do not hesitate to ask questions on the mailinglists and/or report any issues/bugs on our dev tracker.
Please keep in mind that this is an alpha release and be patient while we are working on future versions! :-)