Revert "Merge branch 'refactory_all_class'"

This reverts commit f93cb53696673d0aa15380ceb2c8c473aebfffeb, reversing
changes made to 122f224743a20a3fe74b02d576be110b9e956da3.
Revert "Revert "Merge branch 'refactory_all_class'""

This reverts commit 09839aed8b893c72a64d62fb88aef10834097a5e.
[改良]大幅改良選擇OBJ畫面
- 由於google API 16以後不再維護 Gallery，改用HorizontalScrollView
- 刪除ImageAdapter.java
- 大幅提升選擇圖片的順暢度