Initial move of asset authoring to drools-docs
(cherry picked from commit 092f349b0c7cb6817ad63d4d420d0783404db24d)
Replace reference to Guvnor with Drools Workbench
(cherry picked from commit d39153fc8f2d9ccc37e4359d8e1a889f02ded0fd)
Add general information about the Workbench
(cherry picked from commit 7a3e3181ac2a39811cab3168e4f9440093ae05af)
Add brief documentation about Problems Panel
(cherry picked from commit 39ddf0005ee39d274676f3a4ff2abd4d81d9ee8b)
Add brief documentation about validating files before saving them.
(cherry picked from commit 4d683a3720e0e5386b3eff5159a9fc749a67ccc4)