Fix for onSuccessCallback not called in pipeline

Fixes an issue where the onSuccessCallback method was not being called
when queueing a GetItemScoreInSortedSet command in a pipeline.  The
expected behavior is that the onSuccessCallback method is called after a
pipeline is flushed.
add failing test that's fixed in pull request #127

This failing test is in reference to
https://github.com/ServiceStack/ServiceStack.Redis/pull/127
Merge pull request #127 from alexvodovoz/master

Fixes an issue where the onSuccessCallback method was not being called when queueing a GetItemScoreInSortedSet command in a pipeline.
Set/Sorted Test Key Prefix Consistency

The Set and Sorted  Set tests were not using PrefixedKey() consistently.
As a result, some sets were not being torn down properly between tests.

This prevented the Set and Sorted Set tests from being run in
succession, since some sets used in the Set tests still existed when
Sorted Set tests were run.  The result is an error from Redis, since
Sorted Set operations(e.g. ZADD) cannot be applied to a regulart Set.

The change is to used PrefixedKey() wherever necessary.  SetId has been
changed to a property that uses PrefixedKey(), so most tests were
automatically fixed.
Merge pull request #128 from HookedMediaGroup/settestfailure

Set/Sorted Test Key Prefix Consistency
INCR to v3.9.35
Add "Redis Virtual Machines" section with a link to redishobo
Merge pull request #129 from JasonPunyon/patch-1

Add "Redis Virtual Machines" section with a link to redishobo
latest ss.dlls
Add more love to Redis LUA scripts
tabs suck, using whitespace instead
correct command in RenameNx

from Commands.Rename to Commands.RenameNx
Merge pull request #130 from gdassac/patch-1

correct command in RenameNx
Remove legacy Alchemy support
Add latest SS .dlls
Merge branch 'master' of https://github.com/ServiceStack/ServiceStack.Redis
INCR to v3.9.37
Updated README with examples of Redis LUA support
clarify README
Update README.md