timecop 0.9.11

Changes:	https://github.com/travisjeffery/timecop/blob/master/History.md

Changes:	https://github.com/travisjeffery/timecop/blob/master/History.md

Changes:	https://github.com/travisjeffery/timecop/blob/master/History.md

Switch from Mk/bsd.ruby.mk to Mk/Uses/ruby.mk

Notable changes are.

- Mk/bsd.ruby.mk is moved to Mk/Uses/ruby.mk.
- USE_RUBY=yes is replaced with USES=ruby.
- USE_RUBY_EXTCONF is replaced with USES=ruby:extconf.
- USE_RUBY_RDOC is replaced with USES=ruby:rdoc.
- USE_RUBY_SETUP is replaces with USES=ruby:setup.
- RUBY_NO_BUILD_DEPENDS and RUBY_NO_RUN_DEPENDS are replaced with
  USES=ruby:{build,none,run}.
- RUBY_REQUIRE isn't used anywhere, so removed.
- USES=gem now implies USES=ruby.

This is mainly the work of yasu@ at https://reviews.freebsd.org/D27863

I have just made some cosmetic changes and ran exp-run to test that the
tree is not in a BROKEN state.

Approved by:	portmgr
Differential Revision:	https://reviews.freebsd.org/D37925

timecop is a gem providing "time travel" and "time freezing" capabilities,
making it dead simple to test time-dependent code. It provides a unified method
to mock Time.now, Date.today, and DateTime.now in a single call.

Features:
- Freeze time to a specific point.
- Travel back to a specific point in time, but allow time to continue moving
  forward from there.
- Scale time by a given scaling factor that will cause time to move at an
  accelerated pace.
- No dependencies, can be used with any ruby project
- Timecop api allows arguments to be passed into #freeze and #travel as one of
  the following:
  - Time instance
  - DateTime instance
  - Date instance
  - individual arguments (year, month, day, hour, minute, second)
  - a single integer argument that is interpreted as an offset in seconds from
    Time.now
- Nested calls to Timecop#travel and Timecop#freeze are supported -- each block
  will maintain its interpretation of now.
- Works with regular Ruby projects, and Ruby on Rails projects