Use helm-map prefix instead of hard-coded binding

[NimoTh]

emacs-c-ide-demo/custom/setup-helm.el

Line 79 in 5e77bb7

(global-set-key (kbd "C-c h o") 'helm-occur)

In this and the following three lines, why not use the previously defined helm-map prefix? I think it makes sense to rebind these keys, as well, if the prefix is changed. Currently, they will always be bound to, e.g., "C-c h o" no matter how the prefix is bound.