Version 1.1.0

Refactored command-line options:

* Renamed -p to -r for specifying the path to a local repository.
* Removed -e (replaced by "filter" in JSON configuration file).
* Removed -v (replaced by "verbose" in JSON configuration file).
* Added -c for specifying the path to the JSON configuration file.

Refactored JSON configuration file options:

* Added "filter" for providing file filtering rules to be used by rsync.
* Added "progress" to show file transfer progress during sync.

Usage information is now more useful and contains information about the
JSON configuration file in addition to command-line arguments.
Move git-sync binary to root folder.