added initial README
added Analysis
added analisis for API and Data storage
added deployment Analisis
added expected complexity to the README
Let's start the implementation!!! (but go to sleep first)
added `AdMin` - auto generated by `rails new ad_min`
added gem 'carrierwave' for banners uploading
added rvm evn files. ruby version -  1.9.3 for now.
auto generated Campaign. (see full commit descr)

The Campaign was generated using following command:
`rails g scaffold Campaign name:string ratio_random:integer ratio_weighted:integer`
auto generated Banner. (see full commit descr)

The Banner was generated using following command:
`rails g scaffold Banner name:string image:string`
added auto generated Banner Uploader

Generaged using command:
`rails g uploader Banner`
mounted BannerUploader to Banner model
added auto generated CampaignBanner model

Generated usign command:
`rails g scaffold CampaignBanner campaign:references banner:references weight:integer`
added compaign banneres relationships
make campaign_banners as nested in compaign
added gem 'thin' for development
improved rendering of capaing benners
added simple uniqnes validation ot campaing banners
forbid updatign banner_id for campaign banner