add intdot as version scheme

[tschmidtb51]

I suggest to add a version scheme intdot that is defined as follows:
To compare 2 versions a and b, do:

A = a.split('.'); B = b.split('.')   // split each version on .
for i in 0..min(len(a), len(b):
  if (int(a[i]) > int(b[i])):
     return 'A greater than B'
   elseif (int(a[i]) < int(b[i])):
     return 'B greater than A'

if len(a) > len(b):
  return 'A greater than B'
if len(b) > len(a):
  return 'B greater than A'
return 'A matches B'

This will cover 80% of the currently used version schemes that do not follow one of the well-known version-schemes.

Thoughts?

Flagging @pombredanne for comments.

[tschmidtb51]

@pombredanne What would be the process to get this included?