update readme

README.md

@@ -1,32 +1,19 @@
 punk tcl runtimes for various platforms
-These are 'Batteries Included' Tcl interpreters
-ie - They contain various binary Tcl extensions
-so these runtimes are considerably larger than a minimal tclkit.
 
-punk tcl runtimes all include Tk as a loadable extension 
+These are self contained Tcl interpreters that have a few necessary extensions, but can be used as the basis to build tclkit or zipfs based 'kits' that contain other extensions, including those that contain loadable binary modules.
+
+punk tcl runtimes can all load Tk as a loadable extension 
 - there is no separate Tk runtime
 
-Packages include:
-critcl
-dde
-Ffidl
-iocp
-Memchan
-reg
-sqlite3
-tcllib
-tcllibc
-tcltls
-tdbc
-tdbcmysql
-tdbcodbc
-tdbcpostgres
-tdom
-thread
-Trf
-udp
-vfs
-vqtcl
+The recommended current runtime for Windows is tclsh902z.exe
+as it has tcllibc built in, which can dramatically improve performance in some situations.
+
+In general, the startup, interp creation and library loading performance is better on zipfs based runtimes than those built on tclkit.
 
 Platforms:
 win64
+
+FreeBSD,Linux,Macosx to come.
+The punk kit constructing infrastructure is intended to be cross-platform, and has been minimally tested on Linux & Freebsd.
+It currently requires static tclsh with zipfs or tclkitsh binaries to be manually sourced for non-windows platforms.
+