Merge pull request #1064 from titilambert/branch-1.4

* Add RST documentation
Add: doc into rst mode.
First Try to fix adjust_worker_by_load + Pep8 + Pylint
Second Try : Removing the experimental adjusting load part
Fix #983
Fix #954. Prevent from returning next time notif in the past.
Fix #954. Remove pdb. Will add the issue as test case.
Fix #383 and #897. Same PR as #918
Fix #1005
Fix #1029 + test case
Fix : undefined variable (packaging)
* Add simple functions for triggers
Fix : remove test on value which is an integer. Value = 0 was not send by graphite + Pep8, Pylint