0.1.0.1104

• Implement dynamic generalised lookup (i.e. f(x).[a, b] now works)
• Fix dot / call precendence (i.e. f(x).v now works! - no need for lookup(:v) workaround anymore)
• Format specifiers in interpolation (e.g. "{x:%03d} and {z:%-8.3f} and {y:myfmtfn})
• Source code locations in unresolved var errors
• Multiple performance fixes