在FolderTreeFragment中加入指示当前文件夹的View,并动态变化
Merge branch 'master' of https://github.com/sunalong/FileManager

Conflicts:
	bin/classes/com/itcode/fileManager/R$id.class
	bin/classes/com/itcode/fileManager/R$layout.class
	bin/classes/com/itcode/fileManager/R$menu.class
	bin/classes/com/itcode/fileManager/R$string.class
	bin/classes/com/itcode/fileManager/R$style.class
	bin/classes/com/itcode/fileManager/fragment/FolderTreeFragment.class
	gen/com/itcode/fileManager/R.java
	src/com/itcode/fileManager/fragment/FolderTreeFragment.java