setup.py: error out if database creation fails
setup.py: don't change db permissions
Added space between factors when InvisibleTimes is used
Merge pull request #187 from GitAnt/master

Added space between factors when InvisibleTimes is used
Merge pull request #185 from bnjones/master

Minor setup.py fixes
Possible fix for D[Cos[t],t] behaviour
Removed unnecessary Module block
Added test relative to issue #184
Fixed expected result in added test
Fixed behaviour of Plot with list of functions (including nested lists)
Improved handling of list and dummy arguments
Revert "Fixed expected result in added test"

This reverts commit 0f8f39e71fc912b8a5e4db1323041f3602f7192c.
Revert "Added test relative to issue #184"

This reverts commit 1684ec3136e90d3181985bf6c2f8aef2d5c00ba3.
Revert "Removed unnecessary Module block"

This reverts commit d66bf3e0448e3e3b95a4e2fe0ccefdc111dde07a.
Revert "Possible fix for D[Cos[t],t] behaviour"

This reverts commit 11c6eecf77718e697e38348037131eb2912d12af.
Merge pull request #188 from GitAnt/master

Fix for D[Cos[t],t] behaviour
Merge pull request #189 from GitAnt/plot_branch

Fixes behaviour of plot with defined symbols (addresses #150)
add new contributors to AUTHORS.txt
use '==' not 'is' for string comparison in Plot #189. Thanks @bnjones