A small breaking change for Node.js users. Printing via util is no longer enabled by default but must be turned on with enable-util-print!

Changes & Enhancements:

• defonce added
• specify! added
• tools.reader 0.8.3
• :elide-asserts compiler option

Bug Fixes:

• analyzer/compiler/closure/repls did not properly close files
• undeclared namespace warning regression
• CLJS-751: reducers bug