fix: prevent setting bar too left and getting off the left edge
little adjustment
Merge pull request #10 from larryzhao/fix

fix: prevent setting bar too left and getting off the left edge
Rebuild minified js.
Merge branch 'fix' into ie
Add IME detection
Merge pull request #11 from foo9/ime

Add IME detection
Merge branch 'master' into ie
Add feature that email will be sensed.
Add theme preview image.
Add theme preview to README.md.
Update compatibility with opera.
something done
Merge branch 'master' into ie
Change placeholder to 'http://'.
Add option `keepSlientWhenBlankSelected` to keep popline do nothing when
blank content selected.
Rebuild minify js.
Two popup ways supported, `fixed` and `relative`.
Add popup toggle switcher to demo page.
Add usage of 'popup position' to README.md.