readme update

README.md

-# ffq
+# FFQ
+[![Project Status: Suspended – Initial development has started, but there has not yet been a stable, usable release; work has been stopped for the time being but the author(s) intend on resuming work.](https://www.repostatus.org/badges/latest/suspended.svg)](https://www.repostatus.org/#suspended)
+
+A tool designed to provide preprocessing for FASTQ files. This tool is developed in C++
+
+
+# usage
+
+
+for single-end non-compressed fastq :
+```
+ffq -f example/bad_test.fastq -L 150 -l 4 -t fastq > filtered_test.fastq
+```
+it keeps only sequences with a size between 4 and 150 base pairs.
+
+# install FFQ
+
+Simply type
+```
+make
+```
+it generates a binary `ffq`. 
+Check if the program is working:
+```
+./ffq -h
+```
+should display
+```
+fqq 1
+ffq -f fastq_path -o path [-L max_length] [-l min_length] [-p num_threads]
+  f: input file path.
+  o: output path to write results.
+  L: Maximum read's length (in nucleotides) to keep (default 150).
+  l: Minimum read's length  to keep (default 3).
+  p: enable parallel execution with num_threads threads.
+  t: input file type. Supported types: fasta, fastq, gzfasta, or gzfastq (default: guess).
+
+  h: display this help messsage.
+```
 
- A tool designed to provide preprocessing for FASTQ files. This tool is developed in C++ 
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