Change InReplyToUserId to long

Twitter id's now larger than int32
Fix error parsing
Twitter User IDs are not 64-bit.
Merge pull request #1 from rheckart/master

Twitter User IDs are not 64-bit. https://dev.twitter.com/blog/64-bit-twitter-user-idpocalypse
Merge pull request #138 from Simcon/master

Fixes for TwitterStatus and JsonSerializer
Merge remote-tracking branch 'upstream/master'

Conflicts:
	src/Tweetsharp.PCL/Serialization/JsonSerializer.cs