add default stripe version for load_template
add new test + refactoring
add load_template api instructions to README.md
remove require mocha from test file and add it to the spec helper
add tests for post_to_url method
update .gitignore
remove .DS_STORE from directory
remove default value of stripe version from method arguments and added a instance variable instead
update README.md for instructions on setting the stripe version
remove unnecessary tests
update readme; add links to supported webhook versions
bump up the gem version