split ert tests to separate files. These tests are not required in melpa
distribution.

- merge lexical-binding line with file intro line
- allow capitalize zero in some docstring/error msg
- add "make pkg" this will create tar for package.el

updated many docstring. mostly minor changes.

according to http://www.apache.org/legal/src-headers.html#headers, there
should be no copyright notice in the header.

added "make compile" to byte-compile and run tests in emacs batch mode.

- added zero-version variable in zero-framework.el

- zero-framework.el and zero-pinyin.el when updating zero-fetch-size,
  should update it to

    (max (length candidates) fetch-size)

  because service can return more than asked and it still counts.

- zero-panel.el add hints support and use it for pass has_next_page,
  has_previous_page indicator.

dbus based sync and async api both works.
- added error handler for dbus client in emacs lisp.
- use lexical-binding for all files
- added M-x zero-reload-all this will byte compile and reload file files.

basic things work.
pagination not added yet.