Improve data output format

[ashmaroli]

• cap logger[messge] width at 50 (only while inspecting merged site.data hash)
• logger[message] longer than 50 characters will wrap to following line neatly.
• additionally process nested hashes, sequences and lists to output (limit to grandchild tier. e.g. site.data.parent_key.child_key.grandchild_key)
• take lesser space while displaying the main keys
• colorize the values of site.data.keys
• add extra data files to test edge-cases