update readme

README.md

@@ -4,3 +4,17 @@ My collection of useful shell scripts.
 
 ### killwine.sh 
 kill every wine process including processes hanging
+
+### webptogif.sh 
+convert animated .webp at $1 (path) to a gif
+
+### get_matrix_access_token.sh
+args:
+- $1 username
+- $2 password
+- $3 subdomain (synapse.example.org)   
+returns a matrix access token
+
+### convert_md_to_pdf.sh
+(need to be used with listings-setup.tex in the same folder, xelatex and pandoc are required)   
+convert infile.md in the current folder to a pdf file (outfile.pdf) with code blocks in red boxes.