define bare essentials for era_forest_stratification layer
add documentation for boundary=groupment, clan, or locality
add layer definitions for era ag, edu, and community
Merge branch 'gh-pages' into era
remove redundant div from era_forest_stratification legend
add layer definitions for era clan boundaries and project zones
add legends to Era special projects
add legends for era clan boundaries and project zones
Merge branch 'era' into gh-pages