Refactored hpkg implementation to provide some separation between

public and private API (still far from ideal, but a start):
* moved several HPKG-classes into the public namespace BPackageKit::HPKG
* added fImpl-wrappers around PackageReader and PackageWriter to hide
  most of the gory details
* adjusted 'package'-binary and packagefs accordingly


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40320 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/add-ons/kernel/file_systems/packagefs/Jamfile

@@ -29,16 +29,18 @@ HAIKU_PACKAGE_FS_SOURCES =
 ;
 
 HAIKU_PACKAGE_FS_PACKAGE_READER_SOURCES =
-	BlockBufferCache.cpp
+	BlockBufferCacheImpl.cpp
 	BufferCache.cpp
+	CachedBuffer.cpp
 	DataOutput.cpp
 	DataReader.cpp
 	ErrorOutput.cpp
-	PackageEntryAttribute.cpp
+	PackageContentHandler.cpp
 	PackageData.cpp
 	PackageDataReader.cpp
 	PackageEntry.cpp
-	PackageReader.cpp
+	PackageEntryAttribute.cpp
+	PackageReaderImpl.cpp
 
 	# compression
 	ZlibCompressionBase.cpp