Update README.md

Fixed hero last updated hash key.
From lastUpdated to last-updated
Suggestion: keep the same format for everything, there's another key named lastUpdated
Added Missing Stats

Based on live session, added:
    "armor" : 4344,
    "physicalResist" : 49,
    "critDamage" : 2.87,
    "blockChance" : 0.0,
    "thorns" : 1777.0,
    "lifeSteal" : 0.05,
    "lifePerKill" : 0.0,
    "goldFind" : 0.0,
    "magicFind" : 0.11,
    "blockAmountMin" : 0,
    "blockAmountMax" : 0,
    "lifeOnHit" : 0.0,
    "primaryResource" : 126,
    "secondaryResource" : 0
Update README.md

Fixed typo in artisans on the career data
Fixing typos.

Change "artison" to "artisan"
Change "retreive" to "retrieve"
Fix copy/paste errors in README

The names of some sample API responses were always "Career Profile" due to copy/paste errors.
Merge pull request #2 from sikora/master

Text fix. The correct hero last updated key should be last-updated not lastUpdated
Merge pull request #3 from hossimo/master

Added missing hero stats
Merge pull request #4 from VTorikian/patch-1

Update README.md
Merge pull request #6 from pgrimaud/master

Fixing typos.
Merge pull request #7 from rocketeerbkw/patch-1

Fix copy/paste errors in README