v0.15.3.
Added test for connection, improved coverage.
On branch master
modified:   Readme.md
modified:   package.json
renamed:    test/reconnection-attempts-file-test.js -> test/file-reconnection-test.js
new file:   test/socket-connection-test.js
renamed:    test/reconnection-attempts-test.js -> test/socket-reconnection-test.js