added selector specificity function
Merge pull request #2 from yanhick/selector-specificity

added selector specificity function
added lodash as dep
implemented styled tree data structure
implemented styled tree creation
Merge pull request #3 from yanhick/style

Style
added edge size ds
added rect ds
fixed expanded rect has no expandedBy
fixed recursive rect creation
added dimensions ds
added box type ds
starting to implement layout box
adding more layout box features
working on layout
no runtime error on layout