Fix all scss-incompatible percentages

Wrote a script that does this

````ruby
Dir['**/*.*'].each do |path|
  text = File.read(path)

  text.gsub!(/([1-9]|\s)(\d)%/) do
    first = $1
    second = $2

    result = if first.strip == ''
      " .0#{second}"
    elsif second == '0'
      ".#{first}"
    else
      ".#{first}#{second}"
    end

    puts "#{first}#{second}% => #{result}"
    result
  end

  File.write(path, text)
end
````

Still had to manually review and undo some changes. Will have to
weed out any mistakes going forward.
Merge pull request #25 from aantix/master

Updated to include the Cosmo theme.
Bump version to 0.2.0
Add bootswatch as submodule for convenience
Automate most of (not all) less -> sass conversion
Add ampersand-dash resolver to converter
Auto-convert amelia theme
Auto-convert cerulean theme
Disable percents conversion, clear out escapes
Implement a rake task for building scss files
Rebuild all bootswatches with auto+manual labor
Add HISTORY.md
Update readme
Bump version to 0.3.0
Add converter processor for marking vars default
Make all bootswatch variables overridable

Having marked all variables with SASS !default allows setting these
variables in your project before loading the bootswatch.
Update history and readme
Bump version to 3.1
Use rails-friendly image paths in bootswatches
Add and run converter to escape box shadow args