Merge pull request #3 from ldurazo/master

Android training "Getting started" excercises
Merge pull request #4 from ldurazo/master

Added facebook reminder app.
Merge pull request #5 from ldurazo/master

Merge pull request #4 from ldurazo/master
Merge pull request #6 from ldurazo/master

Merge pull request #5 from ldurazo/master
Merge pull request #2 from jmsalcido/master

Merge pull request #3 from ldurazo/master