Extra bracket causes compilation failure in debug mode.
handleError member function must be declared const.

Otherwise it causes a compilation failure when called from const
functions.
Missing header include in Md2Skini.
Rename Eguitar.tcl so that ElectricGuitar works on case-sensitive file systems.

The shell script uses a different case for the TCL script's filename.
Change the build system from raw autoconf to use automake and libtool.