[win32] require 'date' breaks application when using rhosimulator

[leonardofalk]

The very first require 'date' fails with error:

Exception NoMethodError: undefined method 'new' for: #<NameError: undefined method 'strftime' for class 'Date'>

As a workaround:

# app/application.rb

require 'rho/rhoapplication'
begin
  require 'date'
rescue
  require 'date'
end
...

class AppApplication < Rho::RhoApplication
 ...
end