Update version in *.spec file
Remove unused code and fix building with c++ 4.7.

'method_handler_traits' isn't used in code and doesn't compile with g++4.7, so i have been removed it. Also copy/move constructors/assignment operators have been added to http_headers_t and http_request_t, because g++ 4.7 doesn't implicitly generate assignment operator for http_headers_t.
Release 0.10.6.2.
Merge branch 'master' into v0.11
Bump version.