Replace all instances of string-to-int with string-to-number,

Replace all instances of string-to-int with string-to-number,
insert-string with insert, and read-input with read-string.
(top-level): No need to require imenu, reporter, dinotrace, vc,
font-lock when compiling.  Always require compile.  Relegate remaining
compatibility cruft to XEmacs.  Don't require font-lock.
(verilog-version): Remove superfluous concat.
(dinotrace-unannotate-all, zmacs-activate-region)
(customize-apropos): No need to define.
(verilog-regexp-opt): On Emacs, just make it an alias for regexp-opt.
(verilog-font-lock-keywords, verilog-font-lock-keywords-1)
(verilog-font-lock-keywords-2, verilog-font-lock-keywords-3)
(verilog-startup-message-displayed): These are variables, not constants.
(verilog-batch-execute-func, verilog-auto-inst)
(verilog-auto-inst-param): Use mapc rather than mapcar.
(sigs-in, sigs-inout, sigs-out): Define for compiler rather than
actually defining.
(verilog-modi-get-decls, verilog-modi-get-sub-decls)
(verilog-modi-get-outputs, verilog-modi-get-inouts)
(verilog-modi-get-inputs, verilog-modi-get-wires)
(verilog-modi-get-regs, verilog-modi-get-assigns)
(verilog-modi-get-consts, verilog-modi-get-gparams)
(verilog-modi-get-sub-outputs, verilog-modi-get-sub-inouts)
(verilog-modi-get-sub-inputs): Move inline functions earlier in
the file.
(sigs-in, sigs-out): Don't declare multiple times.
(got-sig, got-rvalue, uses-delayed): Define for compiler with just
`defvar'.
(verilog-auto): Call dinotrace-unannotate-all only if bound.
(verilog-module-inside-filename-p): No need to wrap fboundp test
in condition-case.
(reporter-submit-bug-report): Autoload it.
(verilog-mark-defun): Call zmacs-activate-region only if bound.
(verilog-font-customize): Call customize-apropos only if bound.
(verilog-getopt-flags, verilog-auto-reeval-locals): Use
make-local-variable rather than make-variable-buffer-local.
(verilog-company, verilog-project, verilog-modi-cache-list): Move
make-variable-buffer-local calls to top-level.
(font-lock-defaults-alist): Don't define it.
(verilog-need-fld): Remove.
(verilog-font-lock-init): Don't set font-lock-defaults-alist.
(verilog-mode): Only call make-local-hook on XEmacs.  Set
font-lock-defaults rather than using verilog-font-lock-init.