Start development of 0.4.10
Fixed bug #29
Added getAddress() to the Building class.
A Building can now contain 0-1 address (tags on the boundary) and 0-many
addressNodes (within the boundary).
getAddressNodes() now returns a collection instead of a Set
0.4.10 release candidate 1
Improved check for too large download areas
Added check for empty dataSets
Start of entity support for Associated streets
Improved error handling during downloads.