Eo: highlight class names.

It's kind of cheating, but it's fine for now.

syntax/eo.vim

@@ -15,7 +15,7 @@ syn keyword    eoClassBodyCommon legacy_prefix eo_prefix properties methods even
 
 syn keyword    functionKeywords        set get keys values params constructor destructor finalize virtual const return
 
-syn match      className               "(\w\+\.)*\w\+"
+syn match      className               "\(\w\+\.\)\+\w\+"
 
 syn match      attributes              "@\(inout\|out\|in\|class\|const\|extern\|protected\|constructor\|nonull\|warn_unused\|private\)"
 
@@ -31,6 +31,7 @@ hi def link attributes Constant
 hi def link eo_comment Comment
 hi def link eoBoolean Boolean
 hi def link eoConstants Constant
+hi def link className Identifier
 
 hi def link eoStructure Structure