rename, add cross line in genReadme

--HG--
rename : genmd.sh => genReadme.sh
rename : shell/dir2xml => shell/dir2xml.sh
rename : shell/extvideo => shell/extvideo.sh
rename : shell/mvs2t => shell/mvs2t.sh
rename : shell/shot => shell/shot.sh
rename : shell/shotarea => shell/shotarea.sh
rename : shell/tex2pdf => shell/tex2pdf.sh