Add TODO comments noting temporary bug workarounds.

appveyor.yml

@@ -19,8 +19,8 @@ install:
   - cargo -V
 build: false
 test_script:
-  # Add --no-default-features because wabt and disass don't currently build
-  # on appveyor.
+  # TODO: Remove --no-default-features here. wabt and disass currently
+  # don't build on appveyor due to cmake issues.
   - cargo build --verbose --all --no-default-features
   - cargo test --verbose --all --no-default-features
 branches:

lib/codegen/meta-python/check.sh

@@ -17,8 +17,8 @@ function runif {
 runif flake8 .
 
 # Type checking.
-# Disable mypy checking on osx on travis for now, since pip installs mypy into
-# a directory which is not in the PATH.
+# TODO: Re-enable mypy on Travis osx. Pip currently installs mypy into a
+# directory which is not in the PATH.
 if [ "$TRAVIS_OS_NAME" != "osx" ]; then
     runif mypy --py2 build.py
 fi