Update screenshots with 1.6 UI.
Revise text to reflect navigation changes.

Fixes #479
fix doc errors wrt 1.6 changes.
Add source for clock icon
Fix validation when adding notifications #411

* notification validation was overriding other validations
* invalid crontab will now properly cause failure to validate
Fix Validation error causes exception #411

* don't modify notifications if invalid
Add missing icon fixes #493
Update to 1.6.1-0-SNAPSHOT
Add log4j logging of API requests #499

* simplify api request version checking
Update log4j config to log api requests #499
Add access request logging #499
Update readme examples to use 1.6 versions.
Update copywrite info.
Fix incorrect log4j configuration for api/access logs

For #499
Add missing api test script
Update logging data for api/access log #499

* add to api log: duration, project
* change authtoken logging, emit only 'token' or 'form' into log
Update use of charCode for IE support #503
Add proper "Scaling Rundeck" chapter to admin guide.

Fixes #504
Merge branch 'development' of github.com:dtolabs/rundeck into development
Added background info about scaling examples.
Separate state changes for exec and job #514

* Update execution state from ExecutionJob as a separate service method
* then update job stats, retry X times if a failure, and give up

Execution should not appear "hung" if simple duration stat update fails
Disable devel environment access logs by default