Improve

• Try to parse filename extension before download.

Proguard

1. add proguard

2. add Chinese readme

Improve callback

• Improve restart callback call sequence.

Bug Fix

• improve response time for pausing
• fix unbalanced enter/exit exception

Configuration

• Add init configuration;
• Add allow download param.

Support speed limit

• Support download speed limit.
• Download speed improve.
• Improve filename parse.

Bug Fix

Fix error state persist

Bug Fix & Improve

• Improve memory and connect speed;
• Download core bugs fixed.

New API & Bug Fix & Improve

• New API: downloadTasks change informing.
• Bug Fix: wrong downloadState when schedule.
• Improve: reduce nested function call.

api changes

• remove customer headers
• use errorCode instead of errorMessage
• download error translator API
• logic improve & code clean