For PE binary it's now possible get the *imphash* value through the
lief.PE.get_imphash function. It's also possible to resolve ordinals
imports by using the lief.PE.resolve_ordinals
Resolve#54
* 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)
* Add 'hook_function' to hook a PE imported function
* Add tutorial on PE hooking (resolve#5)
* Add 'PE::get_import' and 'PE::has_import' to retrieve import
