Set up default regex pattern for password correctly
Improve keylen parameter syntax

- Supports single integer or string. (eg. 7 or '7')
- Supports range values. (eg. '6~8')
- Supports comma-separated groups. (eg. '7~8,10')
Add popover to password input box with sender-specific notice messages

- vendor.recognize() requires `notice` value.
- SoftForum uses `X-XEI_PWD_MSG` for notice.
- IniTech accepts optional `question` from ActiveX object param.
- Soft25 uses HintKey for notice.
Working on new password hint rules
Implement handler for new password rules
Update password rules from all plugins
Add experimental support for 우리은행 (#30)
Support non-numeric password (#30)
Merge branch 'keylen'

- Closes #32