added ctags generated 'tags' files to .gitingore for
added support for Pushover API priority brought up by SteveEdson in issue #187; the priority levels can be adjusted either through the handler's constructor or setters
Update .gitignore

removing tags from .gitignore following stof suggestion
Update PushoverHandler.php

simplifying the priority level setting if condition following stof suggestion
Merge remote-tracking branch 'ArturMoczulski/PushoverPriority'
CS fixes, refs #209