Massive reworking of EAS serialization; much smaller and faster now

* Remove all use of Strings in favor of the parser's static final int's
* Strings remain in Tags for debugging output only
* Renamed lots of classes to be more consistent
* Centralized logging behavior in Eas class
* Found and fixed some bugs in the process:
  - Account deletion wasn't removing HostAuth's correctly in the trigger
  - Adding a second EAS account was trashing the first one
  - Fixed looping sync behavior caused by Exchange 2003 bug
22 files changed