Draft: md to rst file conversion
- translated tutorial_platform and tutorial_rfdc to rst files from md files.
- fixed picture of constant block in rfdc showing 2 for the sample instead of 1.
- Added statement about avoiding capital letters in simulink design file names due to Xilinx issue.
- Added lines in both platform and rfdc tutorials that contain the link to the sample design files so the users can have a template to start with.