Tests for rake db:migrate:status.

Fixed assets precompile regex

Not used variables removed. Warnings removed.

Add missing require in base_test.rb, fixes isolated test

Ability to get single full error message

Add first_or_create family of methods to Active Record

This test was introduced in pull request #2577. The author of the pull
request included the test, which was originally in #2230, at the same
time as fixing a separate (but related) bug. However, the author did not
include a fix for this test, so when #2577 was merged, a failing test
was introduced.

So I am removing the failing test for now. If anyone wants to fix the
bug, please do so and submit a complete pull request with a test and
a fix.

revert the changes from c60995f3 - related to marking sub,gsub as unavailable to use with safe strings

"Safe Buffer" should either be the constant with the class name,
or go in lower case. I've chosen to follow the same terminology
that is used in the AS core extensiong guide, "safe string",
though "safe buffer" is also used elsewhere, we should pick one.

better method documentation on disable safe string methods

make gsub and sub unavailable in SafeBuffers - Closes #1555

Include ActiveRecord SQLServer Adapter by @metaskills in new application generator.