Update dependencies packages.

[lijunle]

• Update ESLint to 1.0.0. However, its special parser logic needs update. See eslint-config-airbnb does not depend on babel-eslint any more #50
• Update walkdir to 0.0.11.

[codecov-io]

Current coverage is 97.70%

Merging #51 into master will not affect coverage as of e94f0b7

@@            master    #51   diff @@
=====================================
  Files           10     10       
  Stmts          218    218       
  Branches         0      0       
  Methods          0      0       
=====================================
  Hit            213    213       
  Partial          0      0       
  Missed           5      5       

Review entire Coverage Diff as of e94f0b7

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