Changing File structure and security permissions for /etc/jsnapy

[sidhujasminder]

This pull request takes care of the file permission given to the /etc/jsnapy folder. The Permission currently given(777) are being shifted to 644. The files in /etc/jsnapy folder will be editable by only the root user only from now on.

Another Major Change that is catered in this pull request is the default path for snapshots and testfiles. These files have been moved to the user home directory.
This is how the jsnapy.cfg file looks now.

[DEFAULT]
config_file_path = /etc/jsnapy
snapshot_path = /Users/xyz/jsnapy/snapshots
test_file_path = /Users/xyz/jsnapy/testfiles