Add some ChangeLog entries

docs/ChangeLog

@@ -2,8 +2,37 @@ New in 2015.04
  + Incompatible changes:
    + Installation directory layout changed: it now uses $PREFIX/share instead of
      $PREFIX/languages
+   + "0" (0 as a string) is now True, no special casing anymore
+ + Fixes:
+   + "use fatal" now only works in its scope, and not in deeper ones
+   + detect Failures in constant folding
+   + throws_like will EVAL code in context of caller
+   + pragma's like "strict" can now also be called with -M on the CLI
+   + once a List is infinite, it will stay infinite (fixes several hangs)
+   + can now slice an Infinite list into a finite slice
+   + can now slice a finite list into an infinite slice
+   + adverbs are now allowed inside a ternary
+   + auto-generated accessors will not show up in backtraces anymore
+   + $_ now defaults to Any, rather than Nil
+   + many sequence (...) related fixes
+   + say now observes the .nl setting
+   + exceptions in BEGIN blocks are now handled better
+ + Deprecations:
+   + the RC release in September will remove *all* deprecations
+   + "use nqp" now required for silent use of nqp::ops
  + Features:
+    + native arrays
  	+ 'bit' and 'byte' native types
+    + starts-with/substr-eq/ends-with for comparing strings inside other strings
+    + first steps towards generic lexical pragma's (e.g. soft, strict, nqp)
+    + first steps towards NFC, NFD and NFG!
+ + Speedups:
+    + Str.codes/chars/uc/lc/tc/tclc/ord/flip about 25% faster
+    + List.pick about 10% faster
+    + Mu.clone about 8% faster
+    + make xx about 1.8 times faster
+    + several speedups in matching
+    + numerous Num.Rat optimizations: 6.5x faster
 
 New in 2015.03
 + Incompatible changes and deprecations: