BZ-1056236 - Provide registering TaskLifeCycleEventListener in RegisterableItemsFactory

(cherry picked from commit 64f9f8dd9cb27304f54b5442f95cb5ad640fcd67)
[BZ-1043888] allow to pass a custom ClassLoader when creating a KieContainer
(cherry picked from commit 1cf6aa7add2e9e6ab69f7c11c9ade18d6dd3f99d)
BZ-1038088: document the current capabilities for renaming and deleting packages, files and folders
general updates on project explorer screenshots - just improved css (colors)
BZ-1051225 - Minor spelling mistakes

(cherry picked from commit 3db31f7f5bac2e7aad2cb1e4294f881f11051fa3)
JBPM-4228 - Human task local work item handler swallows exceptions

(cherry picked from commit 1edfda2d6fefd7e7918f6d65e89ec89763c66df0)
 - updating docs for
   - 6.0.1 eclipse update site
   - use of ssh for git
documentation: Minor Corrections
(cherry picked from commit d468ff260a69c92ff28a7b671a8aa1173420e9ac)
documentation: Minor Corrections
(cherry picked from commit 003ebf2869a51252bf812ed23d8b2526fb6cf5d8)
Update remote jBPM documentation (cherry picked from commit 16a564e532d05df8faba55cc747fad4c816ffbb0)
 - small updates to remote api docs
BZ-1053793: adding potentialOwner with paging query to TaskService interface
Updates to REST documentation

- Note about user for tasks
- History operations update
- Moved sections around for clarity