API Update:
lief.MachO.Section.relocations - to access to the relocations
lief.MachO.binary.get_section - Get section from name
lief.MachO.binary.has_section -Check if section with given name exists
Resolve#57
* Improve Resource Manager
* Fix bug when rebuilding resources (aligment issue)
* Provide a Python API to access to the resource tree
* Pretty print lang/sublang of resources
* Parse resource dialog
* Parse resource icons
* Parse resource version
* Add tests on the resource builder
* Add tutorial (related to #28)