I think you need to compile it your self.
Look here for instructions
https://github.com/daid/Cura#debian-and-ubuntu-linux
One problem I see is that it's for i386 or amd64, a raspberry pi is ARMv6, so I think you need to edit package.sh and add ARMv6 support.
I the top add this to the list of build targets
#BUILD_TARGET=debian_armv6
And then after this add a new build target
#############################
# Debian 64bit .deb
#############################
if [ "$BUILD_TARGET" = "debian_amd64" ]; then
export CXX="g++ -m64"
A LOT CODE REMOVED HERE FOR BETTER VIEW
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