Include surveil plugins

[gst]

Moved/included plugins from Surveil. and adapted them for the 'shinkenplugins.plugins' namespace. NB: packs were already included/moved previously.

I've done it by copying git history from surveil (adapting the top directory) :

git filter-branch --tag-name-filter cat --prune-empty --subdirectory-filter shinken-tools -- --all

and then a remote add within monitoring-tools and a merge of the remote branch.

[gst]

@ReAzem : a new PR that you can review (blindly) and merge ;)

[aviau]

TL;DR