systemApi slot

Adding a System slot based on issue #36
Merge pull request #1 from ataran/Issue-36

systemApi slot
Manifest is splitted into slots.
Merge pull request #236 from andrewbol/Issue-83

#236: pull request Manifest is splitted into slots
#master: requs 1.12
skin 1.3.1
todo-s removed
Updating UC1/API 

Correcting in accordance with PO feedback found in #232
Reducing line length

Split statement into two lines
Trailing space

doh
parent 0.23
roles set for puzzles
#239 skeleton
jekyll
Merge pull request #232 from ataran/master

#232: pull request #36 API
jekyll-plantuml
#239 component view
#239 .gitignore fixed
#239 typo
Merge pull request #243 from yegor256/239

#243: pull request 239