Version 0.1.6

Features:

• .push() for dynamic storage arrays.
• Tuple expressions ((1,2,3) or return (1,2,3);)
• Declaration and assignment of multiple variables (var (x,y,) = (1,2,3,4,5); or var (x,y) = f();)
• Destructuring assignment ((x,y,) = (1,2,3))
• Handling of multiple source files in the json compiler.

Bugfixes:

• Internal error about usage of library function with invalid types.
• Correctly parse Library.structType a at statement level.
• Correctly report source locations of parenthesized expressions (as part of "tuple" story).