This approach eliminates necessity to guess model name by file name that
allow to process models with any kind of non-standard capitalization in
class and module names. Though, it still requires that underscored file
name matches underscored model class name. If file is located not at the
top level of models directory then we assume that model is either nested
in the corresponding chain of modules or is not nested at all.

Annotation position defaulted to 'before'. Bugfix: annotate_models.rake uses string instead of symbol.

Allow task loading from Rakefile for gems (plugin installation already auto-detects). Add skip_on_db_migrate option as well for people that don't want it.

Fix options parsing to convert strings to proper booleans. Change annotate to use options hash instead of ENV.

Add a generator (annotate_models:install) to install a Rakefile that automatically annotates models when db:migrate is invoked.

We had stripped the trailing newlines from our Schema Information section. This small fix supports that case.

* Fixed issue with newlines at the end of file.

Prior to this patch every time the schema was regenerated at the end of
the file it prepended an additional newline character. This made the
schema slowly creep down the file over time. Finally annoyed me enough
to fork and fix ;)

Recognize column+type, and don't change a file unless the column+type combination of the new schema are different than that of the old (i.e., don't regenerate if columns happen to be in a different order. That's just how life is sometimes)
Grab old specification even if it has \r\n as line endings rather than pure \ns
Remove gemspec line causing a warning

model file, it will be replaced into the same location.  If it didn't
previously exist, it'll be placed according to the "position", as before.

 * BugFix for models without tables

see http://github.com/branch14/annotate_models/commit/e51c3418ca67fc4e833d31db52f440f8d0e0d3b5