Doxyfile - newly added
CxxUtilities.hh - Doxygen main-page comments were added
Verbostiy.hh - enclosed with namespace CxxUtilities
Bitstream.hh - newly added (copied from SIB2Library by Soki Sakurai)
.gitignore - Doxygen-generated files (documents/html and documents/latex) are ignored
.gitignore - sources/*.o are ignored
Merge tag '20140429_0032' of https://github.com/yuasatakayuki/CxxUtilities into 20140418_1519

Bitstream aded. Doxygen main page added.
Included Exception.hh in Bitstream.hh.