THRIFT-2494: Add enum toString helper function in c_glib

Client: c_glib
Patch: Xiaodong Ma
THRIFT-2490 c_glib: if fail to read a exception from server, client may be occurred double free

Client: c_glib
Patch: Jaesang Kim
THRIFT-2471: Make cpp.ref annotation language agnostic

update boost to 1.53

Patch: Roger Meier
THRIFT-2475 c_glib: buffered_transport_write function return always TRUE.

Patch: Jaesang Kim
THRIFT-2512 lib/${language}/README.md

Client: cpp

merge README_WINDOWS.md and README.SSL.md into README.md