- moved componentsSeparatedByCharactersInSet: into CPCharacterSetAdditions CPString category

- added tests for componentsSeparatedByCharactersInSet:
- ensured Cocoa compatibility of componentsSeparatedByCharactersInSet:
- added new test for CPString boolValue
- fixed CPString boolValue (" ++01" should return NO as in Cocoa, previously it returned YES)

Foundation/CPCharacterSet.j

@@ -322,6 +322,43 @@ _CPCharacterSetTrimAtEnd = 1 << 2;
 
 @implementation CPString (CPCharacterSetAdditions)
 
+/*!
+    Tokenizes the receiver string using the charactes
+    in a given set. For example, if the receiver is:
+    \c "Baku baku to jest  skład."
+    and the set is [CPCharacterSet whitespaceCharacterSet]
+    the returned array would contain:
+    <pre> ["Baku", "baku", "to", "jest", "", "skład."] </pre>
+	Adjacent occurences of the separator characters produce empty strings in the result.
+	@author Arkadiusz Młynarczyk <arek@tupux.com>
+    @param A character set containing the characters to use to split the receiver. Must not be nil.
+    @return An CPArray object containing substrings from the receiver that have been divided by characters in separator.
+*/
+- (CPArray)componentsSeparatedByCharactersInSet:(CPCharacterSet)separator
+{	
+	if (!separator) 
+		[CPException raise:CPInvalidArgumentException
+                    reason:"componentsSeparatedByCharactersInSet: the separator can't be 'nil'"];
+	
+	var components = [CPMutableArray array];
+	var componentRange = CPMakeRange(0, 0);
+	
+	for (var i=0; i < self.length; i++)
+	{
+		if ([separator characterIsMember:self.charAt(i)])
+		{
+			componentRange.length = i - componentRange.location;
+			[components addObject:[self substringWithRange:componentRange]];
+			componentRange.location += componentRange.length + 1;
+		}
+	}
+	
+	componentRange.length = self.length - componentRange.location;
+	[components addObject:[self substringWithRange:componentRange]];
+	
+	return components;
+}
+
 // As per the Cocoa method.
 - (id)stringByTrimmingCharactersInSet:(CPCharacterSet)set
 {