Fix log message that includes a format string argument without any format string formatting. Fixes an exception thrown while logging.
Fix spelling of 'occurred' throughout file.
Merge branch 'RequestProcessor-fixlogmsg' of https://github.com/jasco/robospice
Add stack trace exception when saving to cache fails.
Update changelog for 1.4.6
Initial implementation of observers
Merge branch 'observers' into master-fixed

Conflicts:
	robospice-core-parent/robospice/src/main/java/com/octo/android/robospice/notification/NotificationFactory.java
	robospice-core-parent/robospice/src/main/java/com/octo/android/robospice/notification/RequestNotification.java