make the compilation of ngrt4nd support optional
updated changelog preparing version 3.0.6
added options on the install script to disable prompt and the compilation of ngrt4nd backend
start adding threshold feature
now handle add/remove threshold buttons
added threshold class
now has base for editing and parsing thresholds
fixed calc/prop rule fields filling handling
fixed weight save/load plus misc fixes in ui (disable/enable threshold fields when apppropriate)
renamed variables
removed comment
fixed tooltip and docs link
fixed typo
added missing translation string
removed unnecessary code
now use a map for storing node severity weights
start adding new aggregation algorithm: average now based on weight.
added unit tests and misc
now disable threshold for avegerate rule
now average work