Fixed missing return warning from clang.

Added conversion from ruby to C for use_result_var
Added coding magic comment to tasks/email.rb
Added "." to the load path for ruby 1.9
Add .travis.yml for pull request checking

Notifications are currently disabled
Fix test runs on master, but they still fail
Add .travis.yml for pull request checking

But notifications are disabled
Fix test runs on 1-4-stable, but they still fail

But they fail less than on master.
fix detection of rb_ary_subseq(), use mkmf's have_func()

* See tenderlove/racc#34 and 1b1942a0
Merge pull request #37 from eregon/1-4-stable

fix detection of rb_ary_subseq(), use mkmf's have_func()
use minitest
more ignores
Ensure that test task builds first.
Rakefile cleanup: specify MIT license, use dependency calls, clean up spec_extras.
Merge branch '1-4-stable'

* 1-4-stable:
  Rakefile cleanup: specify MIT license, use dependency calls, clean up spec_extras.
  Ensure that test task builds first.
  more ignores
  use minitest
  Fix test runs on 1-4-stable, but they still fail
  Add .travis.yml for pull request checking

Conflicts:
	Rakefile
Merge branch 'master' into fix-bad-merge

* master:
  Rakefile cleanup: specify MIT license, use dependency calls, clean up spec_extras.
  Ensure that test task builds first.
  more ignores
  use minitest
  fix detection of rb_ary_subseq(), use mkmf's have_func()
  Fix test runs on 1-4-stable, but they still fail
  Add .travis.yml for pull request checking
  Fix test runs on master, but they still fail
  Add .travis.yml for pull request checking
  Added "." to the load path for ruby 1.9
  Added coding magic comment to tasks/email.rb
  Fixed missing return warning from clang.

Conflicts:
	.gitignore
	Rakefile
	ext/racc/cparse.c
	ext/racc/extconf.rb