systemApi slot

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

systemApi slot
Updating UC1/API 

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

Split statement into two lines
Trailing space

doh
#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
Gemfile
merged
#master: parent 0.25
#master: parent 0.25.1