lf sim fixes/creations

fixed lf simpsk
fixed lf em em410xsim
fixed lf sim  (can go right from lf search to lf sim if you have a
strong antenna - if not use a demod first)

client/cmddata.h

@@ -39,6 +39,7 @@ int CmdFSKrawdemod(const char *Cmd);
 int CmdPSK1rawDemod(const char *Cmd);
 int CmdPSK2rawDemod(const char *Cmd);
 int CmdGrid(const char *Cmd);
+int CmdGetBitStream(const char *Cmd);
 int CmdHexsamples(const char *Cmd);
 int CmdHide(const char *Cmd);
 int CmdHpf(const char *Cmd);