Doesn't like when the build deletes then creates the directory

[abersnaze]

Our ant build deletes and recreates the library directory. The delete causes the container to get all sorts of confused and it doesn't pick up on directory with the same name being created.

[krunoslav]

I was testing plugin few days ago, and when our build system changes libs in directory plugin does not automatically see changes in lib directory. Then I have to restart Eclipse.
Probably this is same issue because our build system also deletes lib directory.

[dpalic]

Hello together,
I have provided hopefully a patch for fixing this.
https://github.com/dpalic/SimpleDirectoryContainer_EclipsePlugin
Could you please verify the changes?