windows.errors: fix #987
twitter: Add mentions timeline.
oauth: Generate the oauth signature base string the way twitter does it.
twitter: Add user-profile and refactor a bit.
twitter.prettyprint: Add user-profile.
assocs.extras: adding assoc-sift.
random.mersenne-twister: Don't use system-random-generator to initialize
Mersenne Twister. If there is no system random generator, startup can
fail.
vm: jit::jit is a c++ constructor but it does not allocate objects to the Factor heaps.
Add annotations for gc allocating.
html.parser.analyzer: when matching on classname, check that the tag has the given class
html.parser.analyzer: cleanup, fix find-by-class-id-between.
sorting: simpler check-bounds.
checksums: simplify add-checksum-bytes.
checksums.sha: more types, faster.
checksums.md5: more types and inline, lots faster.
ip-parser: allow zeros in IP addresses.
csv: empty strings and files are valid csv:s
color-picker: Show the hex value of the color because it's useful.
sequences: require integers for slice and repetition.
lexer: cleanup a bit.
continuations: remove seemingly unhelpful comment.