Using xhtml instead of html
Added files to create manual under linux
Added Automated dependency generation (using .d files) in makefile.plain
Added test for circular headers (TODO test) Added makefile.
Described the option "-header_breaks"
Option "--header_breaks" implemented
Title of the TOC page changed to "Table of Contents"
Added brief description for option "--one_file_per_header"
include unistd.h for Mac OS X
add EXE to robohdrs
