Multiplication/division of TimeDelta, updating documentation and tests.
Add __truediv__ for python 3, as well as one-line doc-strings
Allow __abs__ on array, add test, write div in terms of mul: * 1./other
Upgrade distribute_setup.py script to 0.6.45, since then it will recognize that setuptools 0.7 or later is 'good enough' and won't try to replace it.
Fix evaluating a SCompositeModel with labeled input
Merge pull request #1194 from hamogu/fix1194

Remove reference to Table.mask in docs and remove code comment about adding mask arg
Merge pull request #1180 from mdboom/setup/upgrade-distribute-setup

Error: A 0.7-series setuptools cannot be installed with distribute
Merge pull request #1193 from nden/scomposite-with-labeled-input

Fix evaluating a SCompositeModel with labeled input
Small documentation update of rounding issues with time arithmetic
Merge pull request #1082 from mhvk/timedelta-multiples

Multiplication/division of TimeDelta
Merge pull request #1152 from hamogu/follow833

Implement an IPAC table writer
Make it easier to subclass Table

Before this patch, every subclass needed to implemented its own
_new_from_slice.
add more tests, replace other hardwired Table