Row options patch

[zry656565]

• Allow users to select the number of rows in a page
• You can see the demo in ./test.html

• Three test cases fails because I hide pagination when there is only one page. Should I do that?

Running "karma:unit" (karma) task
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PhantomJS 1.9.8 (Mac OS X 0.0.0) Reactable pagination specifying more itemsPerPage than items provides buttons for 1 page FAILED
    AssertionError: expected 0 to equal 1
        at /Users/Jerry/Dev/reactable/bower_components/chai/chai.js:925
        at assertEqual (/Users/Jerry/Dev/reactable/bower_components/chai/chai.js:1402)
        at /Users/Jerry/Dev/reactable/bower_components/chai/chai.js:3638
        at /Users/Jerry/Dev/reactable/build/tests/reactable_test.js:3
..............................................
PhantomJS 1.9.8 (Mac OS X 0.0.0) Reactable filtering filtering and pagination together updates the pagination links FAILED
    AssertionError: expected 0 to equal 1
        at /Users/Jerry/Dev/reactable/bower_components/chai/chai.js:925
        at assertEqual (/Users/Jerry/Dev/reactable/bower_components/chai/chai.js:1402)
        at /Users/Jerry/Dev/reactable/bower_components/chai/chai.js:3638
        at /Users/Jerry/Dev/reactable/build/tests/reactable_test.js:24
PhantomJS 1.9.8 (Mac OS X 0.0.0) Reactable filtering filtering and pagination together updates the current page if necessary FAILED
    AssertionError: expected 0 to equal 1
        at /Users/Jerry/Dev/reactable/bower_components/chai/chai.js:925
        at assertEqual (/Users/Jerry/Dev/reactable/bower_components/chai/chai.js:1402)
        at /Users/Jerry/Dev/reactable/bower_components/chai/chai.js:3638
        at /Users/Jerry/Dev/reactable/build/tests/reactable_test.js:26
...................
PhantomJS 1.9.8 (Mac OS X 0.0.0): Executed 152 of 152 (3 FAILED) (0.464 secs / 0.166 secs)