Merge pull request #22 from OpenBlocksTeam/dev

fix: Fix modules with current type is null

fix: Remove legacy code

fix: modules and active_modules should be defined in modules.json

fix: Fix imported modules doesn't appear in modules_with_jar

add: Warn in log when files already exists on first time

fix: Fix modules.json being empty

fix: Fix importModule using an old version of manifest

code: Optimize code by using another function to do the same thing

Merge pull request #20 from OpenBlocksTeam/dev

fix, style: Handle not implemented Project parser + avoid NPE, fix Javadoc

fix, style: Handle not implemented Project parser and avoid NPE, fix Javadoc

fix: Fix wrong handling of SAF-returned Uri

fix: Fix wrong handling of SAF-returned Uri

Fix installation issue, and more