fixed registering plugin bug; updated readme and examples

[tmbarkve]

Tried to install the plugin and got the following exception:

[1] "register" must be a Function
at Object.exports.apply (/home/torstein/tmp/laabr/node_modules/hapi/lib/config.js:22:10)
at internals.Server.register (/home/torstein/tmp/laabr/node_modules/hapi/lib/server.js:364:31)
at __dirname (/home/torstein/tmp/laabr/examples/simple.js:25:18)
at Object. (/home/torstein/tmp/laabr/examples/simple.js:34:3)
at Module._compile (module.js:641:30)
at Object.Module._extensions..js (module.js:652:10)
at Module.load (module.js:560:32)
at tryModuleLoad (module.js:503:12)
at Function.Module._load (module.js:495:3)
at Function.Module.runMain (module.js:682:10)
generatedMessage: false,
name: 'AssertionError [ERR_ASSERTION]',
code: 'ERR_ASSERTION',
actual: false,
expected: true,
operator: '==' }

Updated the plugin registering to match the v.17 API, as well as updated the README.md

[coveralls]

Coverage remained the same at 100.0% when pulling 495a623 on tmbarkve:master into eb916fb on felixheck:master.

[felixheck]

Thanks for your contribution — even though it's correct to replace register with plugin, its value should be laabr.plugin because the plugin is exposed through the plugin property. Would be happy if you could test this and change if necessary :)

[tmbarkve]

Sorry, my bad, first PR, hence the quality, hehe... Changed laabr to laabr.plugin in examples and README.md - running fine.

[coveralls]

Coverage remained the same at 100.0% when pulling 1b09678 on tmbarkve:master into eb916fb on felixheck:master.

[felixheck]

@tmbarkve thanks for contributing. If there are any further improvements, just proceed ;-)