YaHTTP upstream update

Fixes:
  - Chunked responses and requests are parsed properly even when
    the headers and body come in separately.
list make install content
don't build .a files for backends, we do not use them at all
make lmdbbackend use libtool object
remove .la files during make install
Merge pull request #1495 from cmouse/yahttp-update-20140630

YaHTTP upstream update
SSL support for Socket
SSL support for remotebackend
Refactored to separate class, cleaned up code
Call SSLSocket initSSL
Moved SSLSocket to it's own file to avoid linking polarssl everywhere
Include sslsocket.hh
Remove unnecessary includes
Remove stray include of boost bind
Return EAGAIN instead of WANT_READ/WANT_WRITE