Fix line-endings of sln files.

The sln files used LF EOLs instead of CRLF because the extension since recently was mentioned for inclusion in both conversions. Mention the sln extension only in the list for conversion to CRLF.
Mention any differences between files of the tgz and zip archive of the same version.

A couple of archives, despite being from the same TC version, have differences in their extracted files. Make a note of the files that are different.
Add option to collapse separate extracted tgz and zip commit into one commit.
Mention when conversion process has finished successfully.
Rename tags.

Rename tags from TC_<version> to tc-<version> which seems to be the more commonly used naming convention with git usage.