Migrate installation to autotools

Migrate the installation to auto tools. This allows users to do the usual

configure
make
make install

For details, see the INSTALL file.

In addition, I have remove deprecated PAUSE statements and modified a relative directory in the Fortran code.

NOTE: the line endings in photoz.for have changed from CRLF to LF. To see the actual diff, disable 'Show whitespace changes' in the diff settings.