added pre-existing codebase

• README
• benchmark/benchmark.rb
• lib/chronic.rb
• lib/chronic/base.rb
• lib/chronic/construct.rb
• lib/chronic/grabber.rb
• lib/chronic/ordinal.rb
• lib/chronic/pointer.rb
• lib/chronic/repeater.rb
• lib/chronic/repeater_day.rb
• lib/chronic/repeater_day_name.rb
• lib/chronic/repeater_day_portion.rb
• lib/chronic/repeater_fortnight.rb
• lib/chronic/repeater_hour.rb
• lib/chronic/repeater_minute.rb
• lib/chronic/repeater_month.rb
• lib/chronic/repeater_month_name.rb
• lib/chronic/repeater_season.rb
• lib/chronic/repeater_season_name.rb
• lib/chronic/repeater_second.rb
• lib/chronic/repeater_time.rb
• lib/chronic/repeater_week.rb
• lib/chronic/repeater_weekend.rb
• lib/chronic/repeater_year.rb
• lib/chronic/scalar.rb
• lib/chronic/separator.rb
• test/parse_numbers.rb
• test/suite.rb
• test/test_Chronic.rb
• test/test_Handler.rb
• test/test_RepeaterDayName.rb
• test/test_RepeaterFortnight.rb
• test/test_RepeaterHour.rb
• test/test_RepeaterMonth.rb
• test/test_RepeaterMonthName.rb
• test/test_RepeaterTime.rb
• test/test_RepeaterWeek.rb
• test/test_RepeaterYear.rb
• test/test_Span.rb
• test/test_Token.rb
• test/test_parsing.rb