Create PDE_pt.properties

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Update PDE_pt.properties
Update Language.java
Update PDE_pt.properties

Fixed typos.
fix source/target level in pdex, remove tabs from build.xml
add getFolder() method to Mode
Merge branch 'master' of github.com:processing/processing
Merge pull request #2701 from bgc/master

Added Portuguese Localization
clean up with pt language
Add some helper methods to Language