Update README.md

@@ -6,7 +6,7 @@ Acquire input values
 from files
 ----------
 
-`i_fread <filename.tsv>` read a line of data from the file in tsv (i.e. '0.3  0.55    0.56    ' is a vector of 3 values) and creates a channel (a vector) containing these data.
+`i_fread <filename.tsv>` reads a line of data from the file in tsv (i.e. '0.3  0.55    0.56    ' is a vector of 3 values) and creates a channel (a vector) containing these data.
 If there are many lines, it updates the data as fast as possible with each time.
 It is very fast you can be either be synchronized or using **-p** to requiert a minimal time between each update.
 You can also use a first column describing the time in µs to read the line.