Update ChangeLog for release

docs/ChangeLog

@@ -1,6 +1,59 @@
 See https://github.com/MoarVM/MoarVM/wiki/ChangeLog-Draft for the draft changelog
 since the previous release.
 
+New in 2018.01
+
+**⚠ Feel free to edit this page.**
+
+New in 2018.01
+
+Miscellaneous:
++ Refuse to `make release` with dirty work tree
++ Fix off-by-one error when checking inline boundaries in MVM_frame_find_contextual_by_name()
++ Make it more clear where new ops are meant to go to in src/core/optlist
++ Fix leak when args bind error would unwind rather than return
++ On Windows (not using Visual Studio), print size_t with %Iu.
++ Fix crash in TTY flushing on WSL (Bash on Win10)
++ Do less work in zeroing out VMArray
++ Zero out cut off elements when downsizing VMarray
++ Fix incorrect EOF detection on seek'ed handles
+
+Unicode:
++ ucd2c.pl: Fix White_Space/space Unicode property and several other property aliases
++ ucd2c.pl: code cleanup and refactoring
+
+JIT:
++ jit isprime_I
++ Un-bitrot tools/parse_jitgraph.p6
++ Refactor search_frame_handlers_lex for readability
++ Implement tile for OR operator
+
+Spesh:
++ 473344916 Mark sp_rebless as :noinline
++ 7ea08024e Fix off-by-one error in uninline
++ 85b2c5f82 Pay attention to return op in cross-HLL inlines
++ ed7c1234f Optimize not_i when its input is a known value
++ 671bf1dbf Add some missing fact dependencies
++ 38a7f5771 Remove bogus comment and known value fact tweak
++ c1da6f968 Make instruction deletion within dead BBs a no-op
++ 65098f05b Make log facts tolerate the odd outlier
++ 1e2a3fbe9 Place facts on a `clone` op
++ 4a0a912ef New spesh-bisect.pl tool
++ 8414888be Fix OSR of thread entry frame
++ db706bb7d Allow some cross-HLL inlining, this means we can inline bits of NQP
+  (usually guts like Block.clone) into Perl 6 routines that call them.
+
+Garbage Collection/Memory:
++ Fix memory leaks reported by ASAN
+  + The string stream decoder separator specification buffer(s)
+  + The static frame spesh body statistics buffer
+  + The spesh plan type stats buffer
+  + The spesh plan, when the static frame could not be added
+  + In MVM_unicode_name_to_property_value_code()
++ Debug log fixes:
+  + Fix spelling typos in GC debug log
+  + Remove strange segfault-inducing debug code
+
 New in 2017.12
 
 Miscellaneous: