Remove repetitive and unnecessary table of applications from synopsis.
Remove mention of Adobe Reader, which has been deprecated. Since Adobe
Reader was the last Linux-native application discussed, remove the
mention of Linux emulation from the synopsis. Add ePDFview and Okular
to the document viewers section for PR 193668.

PR: 193668 (partial)
Submitted by: raul.cheleguini@gmail.com, anthony@acperkins.com