Fix: Sessionid is set for full path.
Added request query, post and header straight from request object, no need to get dict first.
Reworked how http exceptions are managed, to allow custom messages and behaviour, for example httpredirect redirects.
Added support to remove sessions.
Added support for merging dictionaries, ths is copy all data from one into another. It duplicates data.
Dict add mehtods can now be chained.
Url add methods can now be chained.
Added initializer_list initialization of onion dicts.
Merge branch 'cpp' of github.com:davidmoreno/onion into cpp

Conflicts:
	src/bindings/cpp/request.hpp