Migration to emacsclient

Dear Mr. Sasikumar,

the issue about using emacsclient instead of gnuserve is quite old, but still I thought I would inform you I forked your codebase and did the migration.
The changes were minimal:
- Quoting of whole Elisp command string
- Wrapping all commands in (progn ...)
At the same time I increased the version to 1.3.0 and updated the readme.

Best regards
Andreas Schmidt