code refactor and fix some error

[vegawong]

fix #6

• 拆分了大部分代码， 抽离成模块文件
• 修复了-d命令下的一些错误
• 优化了一些错误提示

[codecov-io]

Codecov Report

Merging #7 into master will decrease coverage by 0.03%.
The diff coverage is 84.29%.

@@            Coverage Diff             @@
##           master       #7      +/-   ##
==========================================
- Coverage   85.85%   85.81%   -0.04%     
==========================================
  Files           2        9       +7     
  Lines         509      550      +41     
  Branches       96      116      +20     
==========================================
+ Hits          437      472      +35     
- Misses         72       78       +6

Impacted Files	Coverage Δ
libs/list.js	100% <100%> (ø)
index.js	100% <100%> (+15.07%)	⬆️
libs/develop.js	61.53% <61.53%> (ø)
libs/install.js	73.52% <73.52%> (ø)
libs/template.js	77.35% <77.35%> (ø)
libs/update.js	81.06% <81.06%> (ø)
libs/uninstall.js	87.5% <87.5%> (ø)
utils/kit/index.js	92.04% <90.9%> (-1.06%)	⬇️
libs/init.js	95.09% <95.09%> (ø)
... and 6 more

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[coveralls]

Coverage increased (+1.0%) to 79.501% when pulling 3cc1396 on vegawong:master into ae4e123 on steamerjs:master.

[coveralls]

Coverage increased (+1.08%) to 79.614% when pulling 03072cb on vegawong:master into ae4e123 on steamerjs:master.