Added validator for locales based on all strings in the source code.

It checks:
 - whether all keys used by the program are in the locale
 - whether the right number of %s are used
 - if there are no extra keys in the locale that shouldn't be there
This will become very useful when translations need to be updated for new MSE versions.

There is a perl script for generating the 'expected_locale_keys' resource file.
This file contains a list of all the locale keys used.
This is a resource and not a data file because it is automatically generated from the code,
 the user has no business modifying it.

I also fixed all the locale errors I found in the process.

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@613 0fc631ac-6414-0410-93d0-97cfa31319b6

src/gui/control/keyword_list.hpp

@@ -70,7 +70,7 @@ class KeywordList : public ItemList, public SetView {
 	
 	/// Send an 'item selected' event for the currently selected item (selected_item)
 	virtual void sendEvent();
-	/// Compare cards
+	/// Compare keywords
 	virtual bool compareItems(void* a, void* b) const;
 	
 	/// Get the text of an item in a specific column