[C150_I] Working solution found.

- Corrected namespace from C151_I to C150_I

- Renamed Word.Frequency to Word.Weight to reflect property use
- Added CalculateWeight method to Word

- Renamed Program class to Reemvoweler
- Added Pairing class to Reemvoweler, simple object oriented pairing for consonants
  and vowels
- Added PrintResults method to Reemvoweler

- Added simple constructor to Phrase (for use by Pairing class), added Construct
  method to be called by either constructor

Solution should be valid per the challenge rules, but it's not the best
available solution for the problem. This program will need some more fine tuning
before it can meet the challenge requirements for [C151_H].
[C150_I] Cleanup and oranization of Phrase class.