update gemspec and Gemfile

updated gemspec rails version to be grater then 4.0.0. that way i will
work on more projects
created stories and fixed steps

a few steps where out of date and giving errors that "should" shouldn't
be used. created the new stories that i need to fix
added phone and validations

added phone to lead signup. added validation for phone and email
changed controller and views

added phone to the allowed parameters. added phone to the view
made cucumbers more friendly

made cucumbers more friendly and moved step logic into signup_steps
fixed the previous cucumbers
Merge pull request #2 from mixandgo/feature/1_add_phone_field

Feature/1 add phone field