Initial commit with default ruby gitignore

This is taken from github's suggested Ruby.gitignore
Copied License from activerecord adapter
Initial pass of README.md

mostly this was copied from activerecord. Quick Start needs lots of
flushing out
Added Gemfile,gemspec, VERSION

gemfile uses gemspec to get dependencies, gemspec uses VERSION for
the version
Added pointless adapter shell
Made sequel dependency less specific

gem build gave a warning that it was overly strict
Use lowercase sequel gem name
Renamed fdbsql_adapter to fdbsql

Sequel expects the name to be the same as the protocol
Require sequel in main ruby file

Just a little more robust, if you put require 'sql-fdbsql-adapter'
before require 'sequel' it won't crash
add fdbsql schema

this adds it to the adapter map so that sequel doesn't throw an
exception
Vacuous execute method

Apparently Sequel doesn't try to connect until you try to do something
rspec integration in rake file

These run all the integration tests from sequel against fdbsql
Fail if integration uri isn't fdbsql://

Because that's not useful, you could just run the integration specs
in sequel
Added initial docs for running tests
Require the lib folder; don't use the gem

so that you test the current code, not the last packaged code
"Pass" drop_table :if_exists (but still not real)

drop_table? just prints drop_table was called, meaning there should
be substantially less errors
Added vacuous connection object
Actually use a pg connection that's for real

I checked, and it complained that the server wasn't running,
and failed test, then passed the tests when I started the sql-layer
DROP TABLE IF EXISTS works
Restrict to not use 2.99.0

it seems like that's basically 3.0.0, so I'm a bit cautious of using it