Modify Cadencii/EditorConfig.cs add field 'PathAquesTone2'
Rename Preference -> ui/preference/Preference
Add Cadencii/ui/preference/Preference.Designer.cs
Modify Cadencii/ui/preference/Preference.Designer.cs, add aquestone2 related components
Modify Cadencii/ui/preference/Preference.cs, remove '#if JAVA'ed code
Modify Cadencii/ui/preference/Preference, add event handler to select aquestone2 dll path
Modify Cadencii/ui/preference/Preference.Designer.cs, add checkbox 'chkLoadAquesTone2'
Modify Cadencii/ui/preference/Preference.cs, add AquesTone2Requried getter/setter
Modify Cadencii/ui/preference/Preference.cs, refactor to use Linq