cmake files for compîlation
Merge pull request #5 from MarkaPola/feature/cmake

cmake files for compîlation
Changed Char to C in template declarations
json_reader optimization - replaced && with &
json_reader optimization - replaced && with &
Overloaded json operator= for each type
json_object set - changed remove+insert case to assign
Removed uses of an_object and an_array from tests and examples
Added support for is<json::custom_type>
acknowledgements.txt
Lightened notation by renaming object_type to object and array_type to array.
Merge branch 'upstream/master'