Re-number the protocol versions to reflect the "Beta Stage" Try #2

*This 2nd try includes grammar fixes and input from J.R. on references to old numbering system*

It seems logical to inform new comers that the Mastercoin Protocol is currently in the Beta stage of its development. I propose we can easily accomplish this by simply re-numbering the versions of the protocol (both past and present) to version numbers below that of 1.0
For example version 0.1 version 0.19 and version 0.2 for past versions and 0.3 for the current version. This gives the protocol enough room for growth between now and when it does reach a 1.0 stage of development.