Add select and input[type='number'] as choices for time inputs

[strux]

I added some new inputs/features for a project I'm working on and thought you may be interested in merging them.

This branch adds several new options to the input:
:time_input => :text (default), :select or :number

The following apply to input types: :select and :number
:minute_step => integer
:hours_24 => true or false (default)

Examples:

m.input :born_at, 
  as: :just_datetime_picker, time_input: :select, minute_step: 15
# Would render minute as select with four options: 00, 15, 30, 45

m.input :born_at, 
  as: :just_datetime_picker, time_input: :number, hours_24: true
# Would render hour as <input type='number'... with 24 options: 00..23

[mspanc]

Hi Ben, thank you for your contribution.

I will definitely merge such functionality into this gem, but with some modifications:

• 24h mode has to be default as otherwise it will break default behavior of current and past versions,
• AM/PM indicator should be taken from locales (e.g. Greeks use π.µ. and µ.µ., respectively).

So if you plan to rely on this gem in your project when I will release merged version, please take this into account.

[strux]

Hi saepia,

I went ahead and made those changes as they were both good points. Feel free to use or not...