Ida Migrator Versions Save

Change log 28.05.2021:

• Removed a check which prevented the plugin from running on IDA Pro edition that doesn't include hex-rays decompiler (Thanks to https://github.com/erazor-de - https://github.com/giladreich/ida_migrator/pull/2).

Change log 24.05.2021:

• Update directory structure and update readme.
• Update prompt messages and add link to the repo in the intro window.
• Set window title with version as well.
• Print fail message when idaapi.set_name function fails.
• Print success loaded message when it's really loaded (https://github.com/giladreich/ida_migrator/issues/1).
• Add log_info utility to nicely format all printed logs to IDA console.
• Fix compatibility QString API changes.
• Use ida 7.6 compatible api functions.