Fix spelling mistakes in //docs.

This includes spelling mistakes like:

accomodate->accommodate
ommited->omitted
unuseable->unusable
dependant->dependent
enviroment->environment
preceed->precede
occurrance->occurrence
occurrances->occurrences
intergrated->integrated
altough->although
appriopriate->appropriate
corresponing->corresponding
dependecies->dependencies
leniant->lenient
overriden->overridden
persisten->persistent
specifyinhg->specifying

As well as capitalization changes like:

javascript->JavaScript
Webkit->WebKit
linux->Linux

A couple other minor things:

the the -> the
trybot -> try bot
etc.

Review-Url: https://codereview.chromium.org/2551513002
Cr-Commit-Position: refs/heads/master@{#436046}
32 files changed