Transfer file between directory within group upgraded, helpers moved to helpers directory (issue #16 and #14)
File transfer bug fixed
Merge remote-tracking branch 'origin/FileTransferBranch' into FileTransferBranch

Conflicts:
	src/main/scala/org/aphreet/c3/comet/GroupMessagesLog.scala
	src/main/scala/org/aphreet/c3/snippet/groups/snippet/FSHelpers.scala
	src/main/scala/org/aphreet/c3/snippet/groups/snippet/GroupPageFiles.scala
	src/main/scala/org/aphreet/c3/snippet/groups/snippet/GroupPageSettings.scala
	src/main/scala/org/aphreet/c3/util/helpers/C3AccessHelpers.scala
	src/main/scala/org/aphreet/c3/util/helpers/C3ResourceHelpers.scala
	src/main/scala/org/aphreet/c3/util/helpers/FSHelper.scala
	src/main/scala/org/aphreet/c3/util/helpers/FSHelpers.scala
	src/main/scala/org/aphreet/c3/util/helpers/FileSharingHelper.scala
	src/test/scala/org/aphreet/c3/service/acl/HashCalculatingTest.scala
	src/test/scala/org/aphreet/c3/snippet/groups/snippet/FSHelpersTest.scala