move cfg to loggers + refactor + log fn wrappers

1. Instead of maintaining a global config, each specialized logger
now stores its config.
2. Refactored logInterface to elektronLogger.
3. Refactored loggerImpl to baseElektronLogger to be consistent with
the rest of the code base.
4. Wrapped elektronLogger#Log(...) and elektronLogf(...) so that we
do not have to use the instance of elektronLogger everytime we want
to log. Instead, we just do logging.Log(...) or logging.Logf(...).
5. Wrapped elektronLogger#WithFields(...) and
elektronLogger#WithField(...).
6. Refactored codebase to adhere to the changes.

pcp/pcp.go

@@ -47,7 +47,7 @@ func Start(quit chan struct{}, logging *bool, pcpConfigFile string) {
 		scanner.Scan()
 
 		// Write to logfile
-		elekLog.ElektronLogger.Log(elekLogTypes.PCP, log.InfoLevel, scanner.Text())
+		elekLog.Log(elekLogTypes.PCP, log.InfoLevel, scanner.Text())
 
 		// Throw away first set of results
 		scanner.Scan()
@@ -58,14 +58,14 @@ func Start(quit chan struct{}, logging *bool, pcpConfigFile string) {
 			text := scanner.Text()
 
 			if *logging {
-				elekLog.ElektronLogger.Log(elekLogTypes.PCP, log.InfoLevel, text)
+				elekLog.Log(elekLogTypes.PCP, log.InfoLevel, text)
 			}
 
 			seconds++
 		}
 	}(logging)
 
-	elekLog.ElektronLogger.Log(elekLogTypes.CONSOLE, log.InfoLevel, "PCP logging started")
+	elekLog.Log(elekLogTypes.CONSOLE, log.InfoLevel, "PCP logging started")
 
 	if err := cmd.Start(); err != nil {
 		log.Fatal(err)
@@ -75,7 +75,7 @@ func Start(quit chan struct{}, logging *bool, pcpConfigFile string) {
 
 	select {
 	case <-quit:
-		elekLog.ElektronLogger.Log(elekLogTypes.CONSOLE, log.InfoLevel, "Stopping PCP logging in 5 seconds")
+		elekLog.Log(elekLogTypes.CONSOLE, log.InfoLevel, "Stopping PCP logging in 5 seconds")
 		time.Sleep(5 * time.Second)
 
 		// http://stackoverflow.com/questions/22470193/why-wont-go-kill-a-child-process-correctly