Release 1.8.2

• Extend pattern language supported by library (lispkit datatype)
• Support append-map and filter-map in (lispkit list); support fxsqrt in (lispkit math); new functions in (lispkit string): string-empty?, string-pad-center; string-concatenate now supports an optional separator character
• Fix bug in (lispkit set) which was leading to multi-set behavior
• New example code for solving Sudoku puzzles
• Garbage collector optimizations
• Refactored object types to make them more extensible
• A new REPL framework is available via a new framework LispKitTools
• New library: (srfi 175)