Making Thin startup win compatible

---max--conns isn't compatible with Windows in Thin. Using `Gem.win_platform?` To detect windows and avoid --max-conns if necessary. I figured using the Gem library was okay since Volt also has a bundler dependency, which depends on, and expects gems. It was the most reliable way I could think of to get Windows detection accurately and easily.
Merge pull request #67 from ryancastro/patch-1

Making Thin startup win compatible
fix and use +=
bug fix in Volt.user_id
don't auto-import sass partials
Updates to fix Rubocop offenses in project template.
Merge pull request #68 from mariozig/master

Updates to fix Rubocop offenses in project template.
Added numericality_validator, specs not working
Merge branch 'master' of https://github.com/bigtunacan/volt
Added numericality validator require to validations.rb
Working on spec for numericality validation
Finished spec for numericality validator
Update volt.gemspec

Changed byebug to development dependency.
Merge pull request #69 from bigtunacan/master

Added numericality validator
don't include gemset file
No need to explicitly require rubygems
cleanup numeric validation
Merge remote-tracking branch 'upstream/master' into cybernetic-police
Bump ruby version to 2.1.5
Add task for easily running Rubocop