fix grammar in readme
fix struct literal in the readme

The struct definition of `Post` has four fields, it cannot be created
with only three strings in a key-less literal.
run godep && golint against the readme, clean up whitespace
use json.RawMessage for faster and cheaper JSON checks
Merge pull request #4 from attilaolah/grammar

Fix grammar in readme
Merge pull request #5 from attilaolah/readme-fix

README fixes
Merge pull request #6 from attilaolah/isjson

Use json.RawMessage for faster and cheaper JSON checks
add regexps to constants
pre-compile regular expressions for faster pattern checks
Merge pull request #8 from attilaolah/regexp

Pre-compile regexes
add ip validator tag
simplify ip validator functions
remove extra parens