Supports projects, opening from browser, export as database, etc...

Fixed issue #15,#17,#19 and changed Icon, uploaded jni source code, and tried some database learned from https://www-androidhive-info.cdn.ampproject.org/v/s/www.androidhive.info/2011/11/android-sqlite-database-tutorial/amp/?usqp=mq331AQECAEoAQ%3D%3D&amp_js_v=0.1. Also just hided issue #23 until I can fix it. It may be the final release before CSAT.(AT NOVEMBER 15)