[docs/ChangeLog] add many features/fixes from log

docs/ChangeLog

@@ -1,7 +1,12 @@
 New in 2015.07
  + Features:
    + Cool.substr(-rw) and &substr(-rw) now also accept a Range
-   + Added trait "is required" on class attributes
+   + Added trait "is required" on class attributes (and "!" sugar)
+   + Parameters like :n($n) are presented as :$n in .gist
+   + $?ROUTINE and $?BLOCK
+   + Conversion forms now understand :16(':8<377>') and such
+   + &words implemented (to completement .words)
+   + Numeric conversion ops (== > etc) for DateTimes
  + Fixes:
    + ENTER phaser now can be used as an r-value
    + Allow %{Type} as a way to say Hash[Any,Type].new
@@ -11,10 +16,14 @@ New in 2015.07
    + Calling the .clone method with alternate values, no longer changes original
    + Various fixes and optimizations on List.splice
    + .grep and &grep now consumes multiple elements for many-param blocks
+   + Issues with precedence limit checking in EXPR fixed
+   + EVAL now pays attention to languages in the compiler registry
  + Incompatible changes:
    + my Type $a is default($value) is now compile-time checked
    + my $a is default(Nil) only works on untyped (Mu) variables
    + Can no longer (roulette) assign to Whatever slice of a hash
+   + Emit warning when \$ \@ \% \& are used to create a Capture
+   + Now illegal to use a contextual ($*c) before declaring it in a block
  + Deprecations:
    + $*PROGRAM_NAME in favor of $PROGRAM-NAME
    + $*EXECUTABLE_NAME in favor of $EXECUTABLE-NAME