Adding the ability for tests to report they aren't supported on a target

[utils.py] windows problem ...

The last change, additional tests if comand is existing, doesn't work
under Windows because commands are tested only without extensions but
under Windows this is not successful.

Small refactoring ...

Use os.path.abspath for creating absolute path
from given command. This assures that it works
the same on all OSes.

cmd validation added for both relpaths and abspaths ...

cmd validation is run before executing a command. The validation
assures that the command resolves to a file that is executable. This

Fixed falsely giving error for egg modules ...

False error was being given for egg modules that
have not been unzipped but were able to import.
Now __import__ is used for those cases as a last
check.

Checking if path exists before running command ...

There was no path checking before running a command
resulting in a waste of time trying to find the
issue. This was amplified by the fact that no mention
of where the error occurs was made, and neither
which path that the error was raised for.

Removed exit(-1) when checking for missing modules. Instead now it will be prompted to used when singletest starts

Midified way singletest script is checking for installed modules required by test suite

Minor modifications to test api scripts

First RESTful API functionality draft

cppcheck Linux / Windows support

cppcheck cmd call bugfixes

Added tmp file file list passing to cppcheck to avoid 'command line too long' errors

spaces removal - workspace tools (not tmpl)

More changes to the synchronization script ...

1. added the possibility to redirect stderr to stdout in utils.run_cmd
2. synch.py now calls the above run_cmd in redirect mode instead of the
old 'cmd'  that doesn't intercept standard streams. This makes it easier
for an external tool to intercept the output of 'hg'.

Add script to export mbed SDK tests to different IDEs

Add license to workspace_tools files

Refactoring of the mbed SDK: ...

- Provide a well defined HAL and API
- Keep separated the HAL implementations for the different targets

Fix integration with online tools

Fix indentation

Add chroot build option. Add CodeWarrior toolchain

Initial commit of the mbed libraries and tools