Add sample Tcl/Tk scripts to test Tcl/Tk shebang detection

Scripts taken from:
* starfield: http://wiki.tcl.tk/14140
* owh: http://wiki.tcl.tk/906

samples/Tcl/owh

@@ -0,0 +1,63 @@
+#!/usr/bin/env tclsh
+# http://wiki.tcl.tk/906
+
+if {[llength $argv] < 1} {
+   puts "usage: owh ?init? body ?exit?
+   performs body (in Tcl) for each line (\$0) from stdin
+   owh: Ousterhout - Welch - Hobbs, to name a few"
+   exit -1
+}
+
+proc awksplit {text {split default}} {
+    set no 0
+    if {$split eq "default"} {
+        set t {}
+        foreach string [split $text] {
+            if {$string ne {}} {
+                lappend t $string
+            }
+        }
+    } else {
+        set t [list $text $split]
+    }
+    uplevel 1 [list set NF [llength $t]]
+    foreach i $t {uplevel 1 [list set [incr no] $i]}
+    uplevel 1 {set 0 {};trace variable 0 ru 0}
+}
+proc 0 {_name index op} {
+    switch $op {
+        r {
+            uplevel {
+                set 0 {}
+                for {set i 1} {$i <= $NF} {incr i} {lappend 0 [set $i]}
+                set 0 [join $0 $OFS]
+            }
+        }
+        u {rename 0 {} ;# leave no traces of the trace..}
+    }
+}
+
+proc print s {if {[catch {puts $s}]} exit} ;# good for broken pipe
+
+set FS default
+set OFS { }
+
+if {[llength $argv] > 1} {
+   eval [lindex $argv 0]
+   set _body [lindex $argv 1] ;# strip outer braces
+   set _exit [lindex $argv 2]
+} else {
+   set _body [lindex $argv 0] ;# strip outer braces
+   set _exit {}
+}
+
+set NR 1
+while 1 {
+   gets stdin line
+   if {[eof stdin]} break
+   awksplit $line $FS
+   eval $_body
+   incr NR
+}
+set res [eval $_exit]
+if {[string length $res]} {puts $res}

samples/Tcl/starfield

@@ -0,0 +1,28 @@
+#!/usr/bin/env wish
+# http://wiki.tcl.tk/14140
+
+proc stars'go {c factor} {
+    set w [winfo width $c]
+    set h [winfo height $c] 
+    $c scale all [expr {$w/2}] [expr {$h/2}] $factor $factor 
+    foreach item [$c find all] {
+        if {[llength [$c bbox $item]] == 0} {$c delete $item; continue} ;# (1)
+        foreach {x0 y0 x1 y1} [$c bbox $item] break
+        if {$x1<0 || $x0>$w || $y1<0 || $y0>$h} {$c delete $item}
+    }
+    time {
+        set x [expr {rand()*$w}]
+        set y [expr {rand()*$h}]
+        set col [lpick {white yellow beige bisque cyan}]
+        $c create oval $x $y [expr {$x+1}] [expr {$y+1}] -fill $col \
+                -outline $col
+    } 10
+    after $::ms [info level 0]
+}
+proc lpick list {lindex $list [expr {int(rand()*[llength $list])}]}
+#-- Let's go!
+pack [canvas .c -bg black] -fill both -expand 1
+set ms 40
+bind . <Up> {incr ms -5}
+bind . <Down> {incr ms 5}
+stars'go .c 1.05