Incremental gradle build

problem
Whole build process needs to be enabled to build incrementally.
Currently, Gradle builds are not completely incremental due to the fact the static binding generator can't adopt incremental changes. If a javascript file is modified, for instance, Gradle should be able to delete and replace the newly generated Java file. The Same logic applies for deleting and adding new files.

solution
Make the static binding generator able to apply incremental changes.

• deleting files
• adding new files
• modifying files = delete old + add new

This will enable us to use the full potential of the Gradle incremental build.

首先定位静态绑定生成器及其 Gradle 构建集成。追踪生成的 Java 文件如何对应新增、修改和删除的 JavaScript 文件；完成的标准是无需完整重建即可增量反映这三种更改。