Add exclude file from scan feature (#253)

* Added exclude file from scan feature

* Abort exclusion instead of panicking when pattern isn't valid

* Added UI configuration for exclude patterns

*   * cosmetic fixes
  * changed behavior of exclude function to continue and ignore invalide regex patterns
  * added some more tests (windows networks and continue after regex error)

pkg/manager/config/config.go

@@ -23,6 +23,7 @@ const Password = "password"
 const Database = "database"
 
 const ScrapersPath = "scrapers_path"
+const Exclude = "exclude"
 
 const MaxTranscodeSize = "max_transcode_size"
 const MaxStreamingTranscodeSize = "max_streaming_transcode_size"
@@ -91,6 +92,10 @@ func GetDefaultScrapersPath() string {
 	return fn
 }
 
+func GetExcludes() []string {
+	return viper.GetStringSlice(Exclude)
+}
+
 func GetScrapersPath() string {
 	return viper.GetString(ScrapersPath)
 }