Even more aggressive image caching
Increase tappable area for reply/like in detail view
Add preprocessor conditionals for caching and logging

Easily switch off code for caching/logging using these conditionals.
setNeedsDisplay is sufficient for image display

No need to re-layout the entire cell using setNeedsLayout
Merge pull request #35 from Livefyre/dev

Fixes related to avatar image scaling and display