Resolved #137: Move to .Net 4.5.2. Also upgraded Abp.* packages.

Resolved #132: Extract basic properties to non-generic base classes f…

…or Role and User.

Incremented version.

Upgraded to ABP 0.7.3 and inherited AbpSession from ClaimsAbpSession …

…by renaming it to IdentityFrameworkClaimsAbpSession.

Updated test project nuget packages.

Removed unnecessary comments.

Deprecated AbpRoleManager.HasPermissionAsync. Resolved #105.

Resolved #101: Cache user & role permissions.

Upgraded all nuget packages including ABP packages.

Upgraded to ABP v0.6.4.