Fixes a few typos.
Fixed a typo
Typo: "ServiceReciver"
Update 2014-04-01-android-notifications.md
Merge branch 'master' of https://github.com/fbernardo/articles into fbernardo-master

Conflicts:
	2014-04-01-android_101_for_ios_developers.md
Merge branch 'fbernardo-master' into public-master