1.6.2 New terminals

`aqua`: New terminal for Mac OS X. Requires AquaTerm 1.0 or later.

`epslatex`: New terminal. Prepares eps figures for inclusion in LaTeX documents.

`gif`: Consolidated with png/jpeg terminals. Requires libgd.

`ggi`: New full-screen interactive terminal for Linux. Interface to the General Graphics Interface Library.

`pdf`: New terminal exporting Adobe Portable Document Format. Requires libpdf.

`png` and `jpeg`: Support for GIF, PNG and JPEG image output is provided by a new driver via libgd. The new driver supports many more features than the old png driver, including TrueType fonts. Requires libgd.

`svg`: New terminal exporting Scalable Vector Graphics.