set height of container to match textarea

Because the textarea is position:absolute, the height of the container collapses to match the pre element. This fixes that.
changed height() to outerHeight(true)

More accurate height calculation.
Listen to `change` event.  Makes $textarea.val() work.

Fixes #30
add information about changing height manually.  Issue #30
whitespace
merge
whitespace
Set up Qunit
Add expanding.js and test fixture
Add expanding tests
Move jquery-1.7.js into lib dir
Set up travis ci with grunt
Update readme with test instructions
Fix main ref in package.json and test ref in readme
add link to grunt
test commit for travis CI deployment
Merge pull request #1 from bgrins/master

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