Add support to diacritic insensitive search in CPString rangeOfString:options:range: method

When searching by range, the option of diacritic insensitive search was not being contemplated

Also add support to strip variants of 'E' 'I' 'O' 'U' that were not implemented.
Source: http://www.ascii-code.com/

Foundation/CPString.j

@@ -345,6 +345,7 @@ var CPStringUIDs = new CFMutableDictionary(),
     specified mask which can be a combination of:
     <pre>
     CPCaseInsensitiveSearch
+    CPDiacriticInsensitiveSearch
     CPLiteralSearch
     CPBackwardsSearch
     CPAnchoredSearch
@@ -366,6 +367,7 @@ var CPStringUIDs = new CFMutableDictionary(),
     options specified in the specified mask which can be a combination of:
     <pre>
     CPCaseInsensitiveSearch
+    CPDiacriticInsensitiveSearch
     CPLiteralSearch
     CPBackwardsSearch
     CPAnchoredSearch
@@ -393,6 +395,11 @@ var CPStringUIDs = new CFMutableDictionary(),
         string = string.toLowerCase();
         aString = aString.toLowerCase();
     }
+    if (aMask & CPDiacriticInsensitiveSearch)
+    {
+        string = string.stripDiacritics();
+        aString = aString.stripDiacritics();
+    }
 
     if (aMask & CPBackwardsSearch)
     {
@@ -682,6 +689,14 @@ var CPStringNull = [CPNull null];
     return self.toUpperCase();
 }
 
+/*!
+    Returns a copy of the string stripped of diacritical marks.
+*/
+- (CPString)stripDiacritics
+{
+    return self.stripDiacritics();
+}
+
 /*!
     Returns the text as a floating point value.
 */
@@ -948,9 +963,9 @@ var CPStringNull = [CPNull null];
 
 @end
 
-
-var diacritics = [[192,198],[224,230],[231,231],[232,235],[236,239],[242,246],[249,252]], // Basic Latin ; Latin-1 Supplement.
-    normalized = [65,97,99,101,105,111,117];
+var diacritics = [[192,198],[200,203],[204,207],[210,214],[217,220],[224,230],
+                 [231,231],[232,235],[236,239],[242,246],[249,252]], // Basic Latin ; Latin-1 Supplement.
+    normalized = [65,69,73,79,85,97,99,101,105,111,117];
 
 String.prototype.stripDiacritics = function()
 {

Tests/Foundation/CPStringTest.j

@@ -572,4 +572,11 @@
     [self assertThrows:function () { [@"Objective-J" compare:[CPNull null]] }];
 }
 
+- (void)testStripDiacritics
+{
+    [self assert:[@"áa ée íi óo úu" stripDiacritics]  equals:@"aa ee ii oo uu"];
+    [self assert:[@"ÁA ÉE ÍI ÓO ÚU" stripDiacritics]  equals:@"AA EE II OO UU"];
+    [self assert:[@"Å Ã Ê í ö û" stripDiacritics]  equals:@"A A E i o u"];
+}
+
 @end