Merge pull request #2 from Atmosphere/master

Update to latest upstream.
Allow for safe coarser-scope shared AsyncHttpClient creation for which
no client, socket and its options builder exists.
Allow for safe coarser-scope shared AsyncHttpClient creation for which
no client, socket and its options builder exists.
Allow for safe coarser-scope shared AsyncHttpClient creation for which
no client and its options builder exists.
Merge pull request #107 from thabach/master

Allow for safe coarser-scope shared AsyncHttpClient creation for which no client and its options builder exists.