Add the -extdir property automatically if there are native extension dependencies. This deprecates the extDir compiler option.
Do not add duplicate directories to the -extDir option, fix IntelliJ warning
update documentation
Support adding files to an IDEA project from FlexConvention.air.fileOptions
remove unused code
Merge pull request #157 from matyasatfp/IDEA_package_files

Support adding files to an IDEA project from flexConvention.air.fileOptions
Merge pull request #154 from matyasatfp/develop

Add the -extdir compiler option automatically if there are native extension dependencies.