README: update the example, year, links

Also, fix a couple of typos.
Delete "HISTORY" file

It is empty.
LICENSE: update the year
Delete ".gemtest" file
Rakefile: update gem tasks

"gempackagetask" is deprecated.
Rakefile: remove deprecation warning

Use RbConfig.
Update Core docs 1.9

Based on ruby-1.9.3-p385.
[GEM] Generate a new gemspec
[GEM] Depend on YARD 0.8.4 and higher
gitignore: ignore /*.gem/

And convert the entire file EOLs to UNIX (they were using DOS ones).