add log module
Fixed: run into dead state in 99%
Add SIDEBAR class to nav_window
Use new UI style in gtk3.12
Catch truncate() exception
apply logger
using url3 as thumbnail
Warn user when network goes on error
Fixed: emit network-error signal when socket time out
Fixed: hide network-error
set chunk size to 64k
redesign download speed label
Use single thread when downloading small files
Fixed: check task exists in task list
Fixed: failed to check file downloaded signal
Simplify download speed calculation
Support Linux Mint 17
Using PKCS1_v1_5 as RSA encrypt method
Add IconButton
Signin Dialog redesigned; Replace WAP API with passport API