add other unicode line terminators to STRAY_SPACING regex
Rename GoogleURLCanonicalizer* to BasicURLCanonicalizer* and DefaultIA*Canonicalizer* to AggressiveIA*Canonicalizer* to better reflect their roles, deprecating the old class names. Elaborate on javadoc for BasicURLCanonicalizer. Remove scheme-lowercasing from BasicURLCanonicalizer. Add rule to IAURLCanonicalizer to support scheme-lowercasing, and add the rule to AggressiveIACanonicalizerRules. Add new OrdinaryIAURLCanonicalizer for non-aggressive canonicalization and a few tests in OrdinaryIAURLCanonicalizerTest.