Don't touch user's configuration file

[lord63]

#12 Now we won't touch users' configuration file. But the tests still sucks, too many mocks... Orz

[codecov-io]

Current coverage is 100.00%

Merging #14 into master will not affect coverage as of abedde8

@@            master     #14   diff @@
======================================
  Files            4       4       
  Stmts          110     110       
  Branches         0       0       
  Methods          0       0       
======================================
  Hit            110     110       
  Partial          0       0       
  Missed           0       0       

Review entire Coverage Diff as of abedde8

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