Docstring refactor of core

Related to issue #25 and #19. All files in core now have docstrings in the numpydoc format along with some minor refactorings.

src/simudator/core/modules/memory.py

@@ -6,8 +6,8 @@ from simudator.core.module import Module
 from simudator.core.signal import Signal
 
 # Used to pad the values of the memory when saving to file
-VALUE_PADDING = 2
-ADDRESS_PADDING = 2
+MEMORY_VALUE_PADDING = 2
+MEMORY_ADDRESS_PADDING = 2
 
 
 class Memory(Module):
@@ -133,9 +133,9 @@ class Memory(Module):
         file.write(self.name + ":\n")
         for index, value in enumerate(self._memory):
             # Write the address in hex and add ': ' to the end
-            file.write(hex(index)[2:].rjust(ADDRESS_PADDING, "0") + ": ")
+            file.write(hex(index)[2:].rjust(MEMORY_ADDRESS_PADDING, "0") + ": ")
             # Write the value in hex
-            file.write(hex(value)[2:].rjust(VALUE_PADDING, "0"))
+            file.write(hex(value)[2:].rjust(MEMORY_VALUE_PADDING, "0"))
             file.write("\n")
 
         file.write("\n")