Bill Maynard’s blue eyes sparkle with enthusiasm when he’s asked anything about gardening. It’s not surprising considering that he’s devoted his life to helping other gardeners get the most benefit and enjoyment out of their gardens.   This month, he is presenting a workshop to teach local gardeners how to set up, and reap the bounty from, a “Crop Swap” with their neighbors. The Crop Swap idea is a simple one—get together with a group of neighbors once a week to trade produce from your backyard gardens. In the process, you’ll get to know your neighbors, enjoy a variety of freshly grown foods and have a chance to swap information, recipes and gardening know-how.   The Crop Swap workshop w