* remove debugger from esprima
classes transpiler refactoring. this fixed #44

+ core/standardVars: createVars, registerVar
* core.PropertyToString
classes transpiler refactoring. this fixed #44: tests
spread transpiler should respect 'super'
spread transpiler: fixed #43

* spread: use bracesRange if can
* quasiLiterals: tail ')' is now extended string
* functions: tail '}' should not extend arrow function node
spread transpiler: fixed #43: tests
refactoring objectLiteral to using core.createVars
build.js

+ add 'transpiler/core/standardVars'
version 0.7.16