Prepare test environment for intModeToPosix()

Will be needed for doChmod().
Remove obsolete test file
Move CustomAssertions and PathAssert into their own package
Finish tests for FailFastDeletionVisitor
FailFastDeletionVisitor: suppress a warning

That one is rather strange to start with.

SO question: http://stackoverflow.com/q/27555340/1093528
Implement intModeToPosix
MoreFiles: remove leftover main()

Oops...
Oops... Add missing .isTrue() on assertion...
Minor code change
Renamed DeletionRecursiveOption to DeletionMode
Renamed package exception to exceptions
Merge pull request #6 from TheItachiUchiha/master

Common sense renames
Improve PathAssert; introduce custom SoftAssertions
Rename created filesystems to the test class name
Start and write MoreFiles.createFile()