Minor style updates and bumping the nxt version for the next release.
Adding tag printing options.

However, the leaf option must be modified to print the entire leaf
when entering a block, and only the relevant block text when traversing
an intermediate tag.
Updated ntxt printing of tags to include 3 options. Leaf, path, and parent.
Adjusting options.
Changelog.
Do not use to_i on an integer value.
Fixing use of string where integer is required.
Using rubygems/package_task in Rakefile now.
Version bump to 1.0.6 for development.