Build Log Downloader

[toshi0383]

#32

Added build log download feature.
Files are automatically deleted after 7 days.

Screenshot

Download via ActionSheet	LogViewController

LogViewController

Performance issue

It takes too long to colorize large log file with Highlightr.
We should consider range access to the file instead of loading all content of the file at once.
I leave this as future TODO for now.

Color issue

Bitrise emits bash color format, so may be we can manually parse it to show cool colors like we see on Bitrise web console.

Is there any framework or 3rd party tool to do that on iOS UITextView ?

[codecov-io]

Codecov Report

Merging #63 into master will decrease coverage by 1.68%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master      #63      +/-   ##
==========================================
- Coverage   14.84%   13.15%   -1.69%     
==========================================
  Files          48       50       +2     
  Lines        2136     2410     +274     
==========================================
  Hits          317      317              
- Misses       1819     2093     +274

Impacted Files	Coverage Δ
...ent/Sources/List/Builds/BuildsListDataSource.swift	0% <0%> (ø)	⬆️
BitriseClient/Sources/List/Builds/BuildCell.swift	0% <0%> (ø)	⬆️
BitriseClient/Sources/Log/BuildLogDownloader.swift	0% <0%> (ø)
BitriseClient/Sources/AppDelegate.swift	6.45% <0%> (-0.33%)	⬇️
...ient/Sources/List/Builds/BuildsListViewModel.swift	0% <0%> (ø)	⬆️
...Sources/List/Builds/BuildsListViewController.swift	0% <0%> (ø)	⬆️
BitriseClient/Sources/Log/LogViewController.swift	0% <0%> (ø)

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