basic test

todo: use nock to mock http request
update sentry_client in authentication header
arguments explanation and usage sample
fix gitignore
support parse credentials from Sentry DSN
updates on readme
add .travis.yml
updates on readme and travis
add travis notification section
fix makefile
readme and package.json cleanup
dibble client if DSN is empty or invalid
0.1.1
client creation: increase the weight of argument & replace error with log
0.1.2
override settings by argument
bring events to sentry client
0.1.3
add events to doc
Expect first argument to sentry.error to be an instance of Error