wfl can be more verbose

README.md

@@ -59,7 +59,12 @@ process itself.
 
 _wfl_ works with simple primitives: *context*, *workflow*, *job*, and *jobtemplate*
 
-Jobs can also be processed in [streams](https://github.com/dgruber/wfl/blob/master/examples/stream/stream.go).
+Experimental: Jobs can also be processed in [job control streams](https://github.com/dgruber/wfl/blob/master/examples/stream/stream.go).
+
+First support for logging is also available. Log levels can be controlled by environment variables
+(_export WFL_LOGLEVEL=DEBUG_ or _INFO_ _WARNING_ _ERROR_). Applications can use the same
+logging facility by getting the logger from the workflow (_workflow.Logger()_) or registering
+your own logger in a workflow _(SetLogger(Logger interface)_).
 
 ### Getting Started
 

context.go

@@ -3,11 +3,12 @@ package wfl
 import (
 	"errors"
 	"fmt"
-	"github.com/dgruber/drmaa2interface"
-	"github.com/dgruber/drmaa2os"
 	"os"
 	"path/filepath"
 	"time"
+
+	"github.com/dgruber/drmaa2interface"
+	"github.com/dgruber/drmaa2os"
 )
 
 // Context contains a pointer to execution backend and configuration for it.
@@ -150,6 +151,8 @@ func NewCloudFoundryContextByCfg(cfg CloudFoundryConfig) *Context {
 	}
 }
 
+// DRMAA2SessionManagerContext creates a new Context using any given DRMAA2
+// Session manager (implementing the drmaa2interface).
 func DRMAA2SessionManagerContext(sm drmaa2interface.SessionManager) *Context {
 	return &Context{
 		sm:             sm,