Added direct force plugin and fixes in stretching energy

Samo Penic

2019-03-09 2c4278db6ead5c27e30a3000097ed898c968534e

 src/general.c

@@ -135,3 +135,7 @@
    return lockReg(fd, F_SETLK, type, whence, start, len);
}


char *libVersion(){
   return TS_VERSION;
}