Allow specify numbers with suffixes

[Andrey Muzalevsky]

Idea is simple, also is simple to implement and do not conflicting with
existing standard

Readability of javascript can be improved in certain cases like:

   - populationSize = 100000000
   - maxMessageSize = 4194304
   - setTimeout(foo, 30000)
   - if(timeElapsed > 100) {...}

This can be changed to following:

   - populationSize = 100M
   - maxMessageSize = 4MB
   - setTimeout(foo, 30s)
   - if(timeElapsed > 0.1s) {...}

Also it will be great to support floating number, most convinient way to do
this is tract suffix just like a multipler, so

1.5MB == 1.5 * 1MB

Supported suffixes, as I see them:

   - Metric prefixes group
      - follow SI Prefixes
      <http://www.npl.co.uk/reference/measurement-units/si-prefixes/>
      scheme, to decrease entrance level
      - allowing to use short and full form
      - it is case sensetive (bad, but everyone knows it)
      - not sure about μ, it either:
      - (my preference) supported as UTF-8 sumbol, always can be replaced
         with 'full' form when needed(is it recommended to use?)
         - has a replace symbol which can be easily typed
         - allowed only in full form
      - samples:
         - 4M == 4mega == 4 000 000
         - 5n == 5nano == 0.000 000 005
         - 1micro == 0.000 001
      - Bytes prefixes group
      - Metric prefixes turned into bytes prefixes by adding either 'B' to
      short form, or 'byte[s]' to full form
      - Byte suffix is written in upper-case 'B', e.g. 'kB', 'MB', 'GB'
         - This is done to remove inconsistency with widely used
         bit/byte differentiation, e.g. `kb` and `KB` usually mean
different things
      - Samples:
         - 1kB = 1kilobyte = 1024
         - 1MB = 1megabyte = 1024*1024
      - Time group, counted in milliseconds
   - s, sec = 1000
      - min = 60 * 1000
      - h, hr = 60 * 60 * 1000
      - d, day[s] = 24 * 60 * 60 * 1000
      - w, week[s] = 7 * 24 * 60 * 60 * 1000
   - Also it will be good to allow compound number definitions, samples
   - 1h 30min = 1h + 30min
      - 1mB 200kB = 1mB + 200kB


What do you think?
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