Fixing spacing.
Only allow restriction of fourtechs when they make sense.
Merge pull request #967 from chebfun/fix-fourtech-restrict

Only allow restriction of fourtechs when they make sense.
Aligning CHEBGUI fields.
Add some placeholder methods which simply throw useful errors.
Merge pull request #968 from chebfun/feature-dummy

Add some placeholder methods which simply throw useful errors.
Split some tests.
Quantum fix.
By a popular request, introducing the Chebfun logo in Chebgui!
Merge pull request #970 from chebfun/fix-tests

Fix tests
Add cheb2logo().

Not really important, but here it is anyway.  There's no time to comment
the file at the moment, but if someone feels so compelled, they can do
so at any time.
Merge branch 'chebgui-snagging' into development
Merge branch 'development' of github.com:chebfun/chebfun into development
Merge remote-tracking branch 'chebfun/feature-cheb2logo' into development
Some tweaking of the cheb2logo window.
Changed default tolerance to epslevel/2.
Merge remote-tracking branch 'origin' into fix-fourtech-qr-test