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Added the --array flag for consuming all input JSON blobs as if it were one big array.

Now you can use _.data and it won't complain about a keyword.

• Add more functions: any, all, append, sum, maximum, minimum, product, lines, words
• Support any letter in variable names
• Support _.123 integer indexing.
• Add pretty printing support via --pretty
• Support streaming input out of the box

The program is not well tested, but seems to work. Error messages are not good.

The binary files are not statically linked.