[README] Annotate cURL example so it gets syntax highlighting
[Issue #213] Fixing README examples to unwrap NSURL optional initializer
Merge pull request #208 from segiddins/readme-curl-bash-lang

[README] Annotate cURL example so it gets syntax highlighting
Fixing possible exception when force unwrapping optional header properties
[Issue #226] Fixing optional cookie entry in cURL output
Adding missing forced unwrap in test
Fixing optional textLabel property on cells
[Issue #230] Making response object example initializer failable