1.1.5: A lot of fixes and new CLI utility

New features:

• Reimplemented cam (console utility) - now it's on symfony/console and supports all features and more functions (folders, types) of UA.
• Added more detailed installation instructions (./vendor/bin/cam system:drivers) of specific drivers: AlchemyZippy, Cab, Iso, Lzma, Rar, SevenZip, TarByPear.
• Added ability to track progress of archive creation - new argument ?callable $fileProgressCallable of UnifiedArchive::archiveFiles().
• Added ability to pass few directories to be placed in one in-archive directory in archiving/appending (addFiles()/archiveFiles())

  [
      '' => ['./folder1', './folder2'],
      'README.md' => './subfolder/README.md'
  ] # Archive will have all folder1, folder2 contents in the root and README.md

Fixed:

• Fixed extract() and listContent() and their result of PclZip interface (UnifiedArchive::getPclZipInterface()) to correspond to original library (object => array).
• Added tests on archiving, extraction and for PclZip-interface.

Format changes:

• Fixed counting of extracted files when extracting the whole archive in TarByPear, TarByPhar, Zip.
• Fixed calculation archive entry compressed size (approximately) and modification time, implemented entry content streaming in TarByPhar.