Original doxygen css file
Minor tweaks to doxygen CSS
Documentation for Sawyer::Message; new features

* Added Sawyer::Message::Common
Documentation updates

* Documentation is complete for Assert and Message.

* Documentation for CommandLine has been proof read up to the
  SwitchAction class.
API documentation is mostly finished.
Documentation
Message API uses chained property accessors
Command line parse() is free of side effects
Command line arguments that are prefixes of each other
Better error messages
Moved source files into src directory
More tests; better error messages
Cursor requires explicit advance to next argument
(CMake) Add make-install target
(test3) Add case OTHER to remove compiler warning :P

```bash
Scanning dependencies of target test3
[ 66%] Building CXX object CMakeFiles/test3.dir/test3.C.o
sawyer/test3.C: In function ‘std::string color_name(Color)’:
sawyer/test3.C:12: warning: enumeration value ‘OTHER’ not handled in switch
```
Merge commit '27ad4cd4a66dc4102cd1396f957c110b6d420821'

Conflicts:
	CMakeLists.txt
		Both added independent things to the
		end of this file.  Kept both.
Merge commit 'fe07b46d4abc40562e4e6426124444468c0f5f24'
Moved tests and demos into a "tests" directory
Moved doxygen config files to docs directory
Pruned down the README.md file and made it point to real documentation