Update PCL with Profile259

Include the new profile, with WP8.1 support.
Added XSockets Sink
Fixed nuspec
update to loggly 3.5.0
Moved XSockets Sink to correct location
Removed path to old location for XS sink
package updates
PR fixes

-Root namespace set to Serilog
-Properties .cs file now minimal
Set batch config to N Blumhardt recomendation
Merge pull request #246 from prasannavl/master

Update PCL with Profile259
Namespace fix
Merge pull request #257 from XSockets/master

XSockets.NET Sink for Serilog
Merge pull request #259 from neutmute/nm-loggly

loggly update to 3.5.1
Changelist
Merge branch 'master' of https://github.com/serilog/serilog
Additional changelist item
Fixed changelist build numbering
Generate XML documentation in release configuration for XSockets sink.
Make NuSpec file inclusion paths project-relative to fit AppVeyor CI convention
Fixed a NuSpec file path