Create logs filtration system

[rdiachenko]

Look into other viewers: how do they organize their filtration systems. Note the best parts they use and combine these parts in jlv.

Consider the following viewers: http://www.log-expert.de/ http://www.baremetalsoft.com/baretail/ http://www.moonlit-software.com/ http://logsaw.sourceforge.net/ http://jlogviewer.sourceforge.net/