The secret is out: Community colleges are hot, and Douglas County boasts one of the best.Two features of the U.S. economy - it's struggling and it's changing - require many midcareer workers to adapt. Some of them are doing it at community colleges, institutions that know about adapting. Community colleges are still the low-cost, stay-at-home option for underclassmen. But they're increasingly seen as über-trade schools - agile enough to quickly add programs that train students for established and emergent fields that need more educated workers. Community college's traditional strengths - a community-driven curriculum and an inclusive enrollment policy - look …