Colorizes CLI output.

[marschwar]

Displays code smells in yellow and failures in red.
Closes #310

The issue did not really contain any details so I just free styled. Comments welcome. Looking forward to seeing what it looks like on windows.

[codecov-io]

Codecov Report

Merging #1581 into master will increase coverage by 0.06%.
The diff coverage is 96.77%.

@@             Coverage Diff              @@
##             master    #1581      +/-   ##
============================================
+ Coverage     79.37%   79.44%   +0.06%     
  Complexity     1933     1933              
============================================
  Files           330      331       +1     
  Lines          5416     5434      +18     
  Branches        987      987              
============================================
+ Hits           4299     4317      +18     
  Misses          593      593              
  Partials        524      524

Impacted Files	Coverage Δ	Complexity Δ
.../gitlab/arturbosch/detekt/cli/console/Colorizer.kt	100% <100%> (ø)	0 <0> (?)
...ab/arturbosch/detekt/cli/console/FindingsReport.kt	100% <100%> (ø)	5 <0> (ø)	⬇️
...rturbosch/detekt/cli/console/BuildFailureReport.kt	97.67% <95%> (+0.53%)	17 <0> (ø)	⬇️

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[schalkms]

Looks good.
Does this also colorize the specific code smell?
e.g.

Ruleset: complexity
  TooManyFunctions - 12/10 - [Findings.kt] - Line/Column=(1,1) - Path=...

[marschwar]

See https://ci.appveyor.com/project/arturbosch/detekt/builds/23723628/job/sy6jre752wtniqcb#L562

[schalkms]

Thanks for the example. Looks fine!