Guided development installer features implementation to fix #1289

[dgolovin]

1. Including cheatsheet xml into installer at build time and copy included cheatsheet to devstudio/cheasheets folder at installation time
2. Support cheatsheet generation with many cheatsheet references per guided development component

[codecov-io]

Codecov Report

Merging #1317 into master will decrease coverage by 0.58%. The diff coverage is 89.18%.

@@            Coverage Diff            @@
##           master   #1317      +/-   ##
=========================================
- Coverage   93.69%   93.1%   -0.59%     
=========================================
  Files          45      45              
  Lines        4679    4774      +95     
  Branches      512     807     +295     
=========================================
+ Hits         4384    4445      +61     
- Misses        295     301       +6     
- Partials        0      28      +28

Impacted Files	Coverage Δ
browser/model/installable-item.js	92.93% <80%> (-1.02%)	:arrow_down:
browser/model/guided-dev.js	86.73% <95.45%> (+0.31%)	:arrow_up:
browser/model/devstudio-autoinstall.js	97.29% <0%> (-2.71%)	:arrow_down:
browser/services/request.js	97.61% <0%> (-2.39%)	:arrow_down:
browser/pages/install/controller.js	91.86% <0%> (-1.75%)	:arrow_down:
browser/model/helpers/downloader.js	95.53% <0%> (-1.68%)	:arrow_down:
browser/model/che.js	95% <0%> (-1.62%)	:arrow_down:
browser/model/jdk-install.js	93.04% <0%> (-1.49%)	:arrow_down:
browser/services/platform.js	97.05% <0%> (-1.41%)	:arrow_down:
browser/pages/account/controller.js	98.61% <0%> (-1.39%)	:arrow_down:
... and 25 more

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