Adding several gallery* examples.

gallery:
   + chebdermonde, random, vandermonde
   + relevant tests

gallerytrig:
   + noisyfun, random, starburst
   + relevant tests
Resolving merge conflict.

The conflict was caused by the fact that I was working with an
old version of +cheb, one from before Daubechies was added.
Changes agreed upon in the meeting.

+ "chebdermonde" -> "vandercheb"
+ gallery* with no output argument creates a plot of the function
  with appropriate title and axis limits
+ removing () syntax notation in the documentation
Adding sinefun1 and sinefun2 to gallerytrig

+ also adding length/rank to title of plots
Renaming vandercheb in documentation.
am->AM and fm->FM.
Merge branch 'development' of ssh://github.com/chebfun/chebfun into feature-gallery-things
Minor documentation fixes.
Testing both plotting and nonplotting behavior of galleries.
Merge branch 'development' of ssh://github.com/chebfun/chebfun into feature-gallery-things
The plots are now tested using an invisible figure (so that they
don't pop up to the screen when running the tests).