Merge branch 'devel' of https://github.com/Catchouli/coment

connection.disconnect was not removing observers with 0 connections f…

…rom signals

explicit casts

Removing old boost headers

More cleanup

Delaying component map updates to next postUpdate to avoid stl contai…

…ner exceptions

Merge branch 'devel'

Removing EntitySystem because it isn't intended for this release (Sys…

…tem is available instead)

In make install, copying relative link generated by "make shared" rat…

…her than creating a new absolute link