A handful of modifications to allow installation on a windows machine.

A running monologue of my installation progress, which explains the motivation for each change:

The first problem was with `rake db:create`.  It failed with the message `password authentication failed for user "beyondz-playground"`.  Eventually I got the idea that it might not like the dash in the username, so I made another user without it, adjusted .evn & such, and the command worked.

Next, `db:migrate` didn't work, with the message `No source of timezone data could be found`.  I had to include tzinfo-data in the gemfile to fix this.

Next, `db:seed didn't work` (and I began sensing a pattern).  The error: `invalid byte sequence in US-ASCII (Argument Error)`.  I wrote a quick program to scan the project for files with non-ascii characters, and found the offender to be db/seeds.rb.  I added `#encoding: utf-8` to the top of that file to get past the error.

However, that only get me to the next error with `db:seed`.  This time it was a syntax error in app/models/task.rb.  I (maybe?) fixed that, and moved on.