Remove hellno dependency

DESCRIPTION

@@ -13,7 +13,6 @@ Description: 'MTrackJ' is an 'ImageJ' plugin for motion tracking and analysis (s
 License: GPL-3 | file LICENSE
 LazyData: TRUE
 Depends: R (>= 2.10)
-Imports: hellno
 URL: https://github.com/burgerga/mdftracks
 BugReports: https://github.com/burgerga/mdftracks/issues
 Roxygen: list(markdown = TRUE)

NAMESPACE

@@ -2,6 +2,5 @@
 
 export(read.mdf)
 export(write.mdf)
-import(hellno)
 importFrom(utils,capture.output)
 importFrom(utils,read.delim)

R/mdftracks.R

@@ -7,7 +7,6 @@
 #' @docType package
 #' @name mdftracks
 #' @seealso [MTrackJ Data Format](https://imagescience.org/meijering/software/mtrackj/format/)
-#' @import hellno
 NULL
 
 
@@ -293,7 +292,7 @@ getClusterTracks <- function(cluster.lines) {
   }))
   # Bind list together to get the DF, then convert to data matrix (make numeric),
   # then back to DF
-  as.data.frame(data.matrix(do.call(rbind, track.df.l)))
+  as.data.frame(data.matrix(do.call(rbind, track.df.l)), stringsAsFactors = F)
 }