Add ChangeExeDir() and MakeDir()

[codecov[bot]]

Codecov Report

Merging #76 into master will decrease coverage by 1.13%. The diff coverage is 56.52%.

@@            Coverage Diff             @@
##           master      #76      +/-   ##
==========================================
- Coverage   96.35%   95.22%   -1.14%     
==========================================
  Files          21       22       +1     
  Lines         796      816      +20     
==========================================
+ Hits          767      777      +10     
- Misses         23       29       +6     
- Partials        6       10       +4

Impacted Files	Coverage Δ
yos/exist.go	100% <ø> (ø)	:arrow_up:
yos/common.go	100% <ø> (ø)	:arrow_up:
yos/copy.go	93.63% <100%> (ø)	:arrow_up:
yos/directory.go	54.54% <54.54%> (ø)

[codeclimate[bot]]

Code Climate has analyzed commit 96eb9455 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 64.7% (50% is the threshold).

This pull request will bring the total coverage in the repository to 96.5% (-0.9% change).

View more on Code Climate.

[an63]

Here is an overview of what got changed by this pull request:

Complexity increasing per file
==============================
- yos/directory.go  6
- yos/directory_test.go  3

Clones added
============
- yos/exist_test.go  3

See the complete overview on Codacy