Minor tweaks

- Less bias towards XMLVM
- More clarification on where AppCode is better than Xcode
- Added plain plist files as persistence type
- Link to what prefixes for classes to use
- Typo fix for ui design question
- Periods for good design tips
- Correct link to swift blog
- CocoaPods is a dependency manager
- A couple of more pods
Merge pull request #1 from eimantas/master

Minor tweaks - thanks for the edits :).