Fix Revision.isDeletion() is not public and should be.  Issue #169

https://github.com/couchbase/couchbase-lite-android/issues/169
validate() now returns a boolean.  see issue #170

couchbase/couchbase-lite-android#170
Database.delete() should return void instead of boolean

https://github.com/couchbase/couchbase-lite-android/issues/171
Custom doclet which allows the use of the @exclude tag, which will cause that method to be excluded from the generated javadocs.

https://www.couchbase.com/issues/browse/CBLT-197
Add @exclude javadocs tags to Manager
Bump manager version to 1.0.0-beta2
Javadocs for manager options class
Add @exclude javadocs tags to Database
Add @exclude javadocs tags to Document
Javadocs and @exclude for DocumentChange
restrict javadocs to only show public methods/fields
Javadocs and @exclude for Revision
exclude apache classes from javadocs
Improve javadocs + @excludes for View and Attachment
exclude com/couchbase/touchdb classes from javadocs
Add more @excludes to javadocs
Add ability to filter out packages from javadocs (thanks Wayne!)
Add ability to filter out packages from javadocs - forgot to check in jar.
Noticed these constructors were not actually package private and should be.
ignore any *.class files