light-weight, simple source_path, target_path dependency management

Modules
		libtbx.easy_pickle os sys time

Classes
		__builtin__.object node_info pair_info target_db   class node_info(__builtin__.object)       Methods defined here: __init__(self, path) current_md5(self, path_prefix=None) current_mtime(self, path_prefix=None) full_path(self, path_prefix=None) has_changed(self, path_prefix=None, mtime_resolution=2) Data descriptors defined here: __dict__ dictionary for instance variables (if defined) __weakref__ list of weak references to the object (if defined)   class pair_info(__builtin__.object)       Methods defined here: __init__(self, source_path, target_path, needs_update=True) done_building_target(self, path_prefix=None) eval_needs_update(self, source_path=None, path_prefix=None) start_building_target(self, path_prefix=None) Data descriptors defined here: __dict__ dictionary for instance variables (if defined) __weakref__ list of weak references to the object (if defined)   class target_db(__builtin__.object)       Methods defined here: __init__(self, file_name, file_name_during_write=None) pair_info(self, source_path, target_path, path_prefix=None) show(self, out=None) write(self) Data descriptors defined here: __dict__ dictionary for instance variables (if defined) __weakref__ list of weak references to the object (if defined)

Functions
		hashlib_md5 = openssl_md5(...) Returns a md5 hash object; optionally initialized with a string