[workspace_tools] project.py - some more changes ... ...

... suggested by PrzemekWirkus

[workspace_tools] project.py - some changes ... ...

... suggested by PrzemekWirkus

[workspace_tools] project.py adding 2 cmdline options ...

- Adding an option to print a matrix similar to build.py -S with targets
and supported IDEs
- Adding an option to write README.md in workspace_tools/export

Added new functionality to project.py switch -m where we can now separate using comma platforms. Now when you specify more than one platform, for each your peoject will be exported

Modified exporters so they support extra macros from external libraries like CppUTest library

[PROJECT.py] removed the sys.exit() after cleaning

[PROJECT.py] add option 'clean' ...

Adds the cmdline option clean (to clean the export folder) and some
minor things (spelling and option order).

[PROJECT.py] adds cmdline option to use program_name instread of program_id

[PROJECT.py] sorts targets and toolchains for help option ...

Sorts targets and toolchains for help option and adds new option -L to
generate the list with possible projects to generate.

spaces removal - workspace tools (not tmpl)

Always use the local version of workspace_tools ...

This ensures compatibility with the mbed-tools package.

Add script to export mbed SDK tests to different IDEs