Refs #3009: Inital version of the Rudder maintenance handbook
Refs #3009: Added a part about setting a RAMdisk for CFEngine in the HandBook
Refs #3009: Correct some of the handbook statements to reflect NCH's corrections in the pull request
Fixes #3084: Create a Technique library upgrade walkthrough
Merge pull request #2 from Kegeruneku/ust_3084_doc_3084_create_technique_upgrade_walkthrough

Fixes #3084: Create a Technique library upgrade walkthrough
Merge pull request #1 from Kegeruneku/branches/rudder/3009_rudder_handbook_creation

Refs #3009: Inital version of the Rudder maintenance handbook
Merge branch 'branches/rudder/2.4' into branches/rudder/2.6