Correct readme typos

To increase readability.
Merge pull request #20 from justinleveck/correct_typos

Correct readme typos
Make post script hooks no longer affect exit code.

I did this because it was confusing that the after_success, after_failure, and
after_script hooks were affecting the exit code of the boxci test command.
Add export of BOXCI_TEST_RESULT for exit code.

I did this so that people could have their after_script commands know if the
build succeeded or failed. This closes #23.
Setup default rake task to run rspec.

I did this so that BoxCI and Travis CI will both be able to use their default
build actions.
Add basic .travis.yml to get Travs CI builds going.
Changed hashes to be compatible with ruby 1.8.7
Add Travis CI status image to top of README.md

I did this so that people could easily from viewing the README.md on GitHub if
the project is passing or not.
Add RubyGems version badge to the README.md

I did this so people can easily see from viewing the README.md on GitHub what
the latest released version is on rubygems.org.
Add Code Climate badge to README.md

I did this so that it would raise awareness of the code quality so that we may
do a better job of staying on top of it.
Add code coverage badge from code climate as well.

I did this so that we would have visibility of the code coverage as well to
help keep us on top of it.
Add Code Climate test coverage functionality.

I did this so that we actually get code coverage metrics for this project.
Fix Gemfile format for 1.8.7
Add json gem for code climate coverage in 1.8.7
Add gemnasium dependency status badge.

I did this so we could easily see when the repo is behind on dependencies.
Removed 1.8.7 testing.

I did this because 1.8.7 testing was failing because Code Climate code
coverage gem is written to only support 1.9.2 and up. It uses the new hash
syntax. I created a ticket to further investigate if we really need to support
1.8.7 or not. If we find we do then we will have to add 1.8.7 testing back and
identify a different code coverage solution that will work with 1.8.7.
Switch code climate badges over to img.shields.io

I did this because the Code Climate badges didn't match the others and were
blurry and looked bad.
Switch Code Climate badges to SVGs.

I did this so they look exactly the same and are cleaner.
Switch to coveralls.io for code coverage.
Add coveralls.io badge and add 1.8.7 testing.

I added the badge so we could see the coverage easily. I added the 1.8.7
testing back to see if coveralls.io would work properly with 1.8.7.