Provide an explanation for the -T flag
Start with verbose commands, then explain potential shortcuts
Remove alias jargon in favour of English
Testing is covered in a section of Installfest, so change wording to not discount it
Replace shortcut section with a rails command breakdown and short data type explanation without saying the word 'data type'
Backport change to 4.1 guide to 4.0 and 3.2
Merge pull request #42 from paulfioravanti/getting-started-edits

Getting started edits