Doc: Updated wording on some pages e.g. index.rst and general spelling and grammar fixes.
Merge pull request #2082 from ham1/master'
aspell check fixes #2083
Merge pull request #2084 from ceeaspb/documentation_aspell_check

Documentation aspell check
Fix exitHereIfFailed example, close #2086
Minor clean up
Rename "sessions" to "users" in reports, see #2097
configurable responseBodiesFolder
expose responseBody
dump response bodies (disabled by default)
RawFileBody & ELFileBody can be used for checks
more specific file extractors for bodies
perform raw response body check when requested
support base64-encoded content text (HAR 1.2)