I forgot to include a dependency, here fixed(installation error still occurs):
Monogame Content addin for monodevelop 4:
https://mega.co.nz/#!bIAzgaDI!-aomQYJYr-sQt_4cNAGC_OOmC0rcRkn1n7dBFzHjUHg
Monogame Content addin for monodevelop 5:
https://mega.co.nz/#!iRQhXbTA!ERp3z_psUQHNBKgM-_9lATU6Q3vT8tirwX_mFBRgtqc