Add ssrclient Pd external
ssrclient: return list of floats instead of individual floats

With this, only one IP packet per message should be generated.
This is no guarantee, though.

Also, now it is compatible with both iemnet/tcpclient and
mrpeach/tcpclient.
ssrclient: allow 1/0 in addition to true/false

According to the xs:boolean data type.
http://www.w3.org/TR/xmlschema-2/#boolean
ssrclient: avoid variable for SLAXML library
ssrclient: add some comments
ssrclient: remove some debug output
ssrclient: Handle messages from loudspeaker-based renderers
ssrclient: README changes
Add README for flext/ directory
ssrclient: move require() to the top of the file again

For some reason, it didn't work in pd-extended for Mac OS X ...

This basically reverts commit 4a09cec85b3b27d11a94f3c0788dfdb7626846d8.
Replace {} with ()

This is because g++ (Debian 4.9.1-14) produced an error:

    internal compiler error: in convert_move, at expr.c:331

See https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=761529 and
https://github.com/SoundScapeRenderer/ssr/issues/22
MEX: bugfix for converting empty strings
Merge remote-tracking branch 'origin/master'