VMM/Config: reworked configuration handling. Implemented LazyConfig(RawConfigParser) and LazyConfigOption(object) Rewrote Config class: * use default values and added some validation stuff * removed attributes: __VMMsections and __changes * replaced methods __chkSections() and __chkOptions() with __chkCfg VMM/VMM: Adjusted to reworked Config class. * removed attribute __cfgSections * removed methods: cfgGetBoolean(), cfgGetInt(), cfgGetString() * added methods: cfgDget(), cfgPget(), cfgSet() VMM/__init__: added function get_unicode() vmm: Adjusted to replaced methods in VMM/VMM.

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