add loggers
Revert "add loggers"

This reverts commit a1677866a07698eb6fe8dddca6b1ae1744aa9554.
Merge branch 'debug'
change DummySectionFragment from TextView to WebView
add a permission to use the Internet
load "google.com" (temporarily)
Merge branch 'webview'
make not to redirect
Revert "make not to redirect"

This reverts commit d37de3ff323c62591829438e27df88ea1724546f.
observe on url loading
load new url
observe onPause
call super.onPause to avoid an error

if don't call it, app exits.
observe onResume
observe onCreate
Merge branch 'research-fragment'