Merge pull request #714 from anserran/master

i18n path to allow customization of strings location
If last project fails to load, assume it is corrupt
open a blank project instead, and avoid crashing
Changed some i18n and icon names.
Added new actions for new effects (Animation, TimedEffect...)
Minor changes.
Added methods in EffectsIndex and new attributes in FieldName
Added widget for show a timeline.
Added widgets that contain a effect.
Added layout that contains a TrackEffect.
Added widget to show the edition of animations.
Merge pull request #715 from manuel-freire/avoid-fail-load-loop

If last project fails to load, assume it is corrupt
Changed actions of effects for not to use the values of TrackLayout widget as args.
Also corrected some minor typos.
Merge pull request #716 from gorco/EditAnimationWidget

Edit animation widget
Initial mockup files cleaning.
Mockup android, mvn, skin and other cleanings.
Merge pull request #717 from RotaruDan/mockup_android_cleaning

Mockup android cleaning
Completed base skin and added some icons.
Minor changes.
Added two test to see the skin created.
Merge pull request #719 from gorco/UISkin

Ui skin