Add dependecies.
Add logger.
Add partial chrome driver.
Update.
Remove .init(), open with specified url.
Rename .isExistent() to .isExist().
Open window in a child process, so all window of one browser could be closed by kill the child process.
Update logger message.
Update.
Update driver.
Rename .browsers to .availableDrivers.
Update .open().
Check supported platform.
Remove dependency on tree-kill.
Remove redandant log message.
Fix the bug of platform checking.
Update.
Add firefox driver.
Rename.
Add safari driver.