Connext Micro Standalone

[deeplearningrobotics]

It seems that the Connext Micro depends on some CMAKE modules not available to the public and also some reference is missing which version of ConnextMicro is supported (2.4).

So we should:

• Update the documentation to mention the supported Connext Micro version which is 2.4.
• Replace the non-public CMAKE find modules with something else that is publicly available.
• Link Connext Micro documentation to the Readme for installation instructions so far available.