Fixes some order dependent failures in test suite.

Introduced in pull request #72.
Fixes test failures reported in #80.

You might want to merge this. It should work everywhere unless the user running
the tests has an insanely large cwd. I think it's better than the hack I linked
in issue #80.
Merge pull request #81 from deivid-rodriguez/fix_autolist_and_autoeval_tests

Fixes some order dependent failures in test suite.
Merge pull request #82 from deivid-rodriguez/fix_width_issues_in_test_suite

Fixes test failures reported in #80.
bump ruby_core_source dep
Merge pull request #86 from tessi/bump_rub_core_source_dep

bump ruby_core_source dependency
Bump to version 1.6.1
update changelog
update readme