Changes since v0.2

- split fgen in fgen+f2html
- option -h means really help now
- remove option -H (option -d for f2html)
- replaced -r by -f
- replaced --f90header by -77. Default is now f90
- add option -n (no utils check)
- fgen code cleanup, speedup
- a master makefile is created if necessary

Changes since v0.1

- add --f90header in the call to fgen for targets dep & html in the makefile
  rules if --f90header was specified when creating the makefile.
- Don't add dependencies when a module is defined and used in the same source
  file.
