Add Android Studio to gitignore file
ChangeList:

  * Move project from Maven to Gradle
  * Move project to Android Studio
  * Add a server side api
  * Add translate in Spanish
  * Add double tap on manga description for extend it
  * Add long tap on resume button or start button for open modal where to introduce a specific chapter number
  * Improve mark in the last page read per chapter read
  * Improve UI for tablets
  * Improve UI for History tab
  * Fix a bug with pinch in the manga reader
  * Fix a bug with manga descriptions