Created platform-specific Configuration defaults for PCL
Remove dependency on System.Threading.Tasks.dll

Fixes #95
Remove unused libraries
Fixed off-by one error in cache eviction code
Fixed PCL Desktop PageCacheSize configuration
Fixes for unit test setup

Includes a workaround for a bug in System.URI when trying to combine a
URI and a fragment ID.
Merge branch 'feature/portable_configuration' into develop
Added unit test for Identifier attribute on base class
GetIdentifierPrefix returns prefix from base interfaces
Fixes for SPARQL connection strings

Internally now defaults the store name to "sparql" when a SPARQL
connection string is constructed.
Unit test and fix for SPARQL delete pattern bug

See https://brightstardb.codeplex.com/discussions/541011
Enable logging in service and console runner

Fix for issue #96
Updated version number and what's new for 1.6.1
Fixed build for PCL unit tests
Updated text template for samples
Fixed samples project to build SDK
Updated entity context files
Binding redirect for Newtonsoft.Json
Fixed typo in sample code

Fixes issue #97
Removed obsolete mobile libraries from build