Prop: Support creating int array props from Python
Fix some 64-bit to 32-bit shortening warnings
Prop: If the user requests an int64 prop, fall back to int
give proper feedback for old-style python classes trying to use cache_method
python: Add hash and comparison wrapping
SConstruct: Make module explicitly depend on library

scons seems to miss this dependency on Mac for some reason.
make develop target to make symlinks in  pointing back to the source tree
Merge branch 'master' of git@github.com:otherlab/core
added scons develop doc to README
Expose fast_singular_values to Python
SConstruct: Don't warn about disabled unused libraries

If we manually disable both imath and openexr, we shouldn't complain that
openexr is disabled because we lack imath.
README.md: Fix Debian instructions
added operator== for NdArray
fix compiler complaint about pointer type in memset
exposed class attribute in svg read, lower level access to SVG data
Make props made from ndarrays default to type NdArray<T>, and only make Vecs and the like if a small shape is given for a dimension
send ndarray values as a special json object
Merge branch 'master' of git@github.com:otherlab/core
Prop: Understand both long and long long
add json conversion for lists