New functions and patches:

• `try/catch`: explicit specification of an error variable right after the `catch` token is now optional. If no error variable is given, then the error message is automatically stored to the local `lasterror` variable, and the `then` keyword must be left out:

  > try
  > error('oops !')
  > catch
  > print(lasterror)
  > yrt;
  oops !

• The `try/catch` statement sometimes did not work in procedures (unassigned error variable). This has been fixed.
• The new `net.wget` function downloads HTML pages from the Web.
• Tuned `skycrane.counter` by 10 %. The function now optionally applies the Kahan-Ozawa instead of the original Kahan summation algorithm if the new third argument is the string 'ozawa'. The corresponding C sources have been modified to prevent compiler optimisation, which could cancel the optimisations, as well.
• `argerror` now prints the user-defined type name of a value received in its error message. If a value does not have a user-defined type, then its basic type is issued.
• The new 'a' option to `debug.getinfo` returns the number of arguments expected by a procedure, thanks to Rob Hoelz' LuaPowerPatch.
• Improved `index out-of-range` error message for strings.
• Modified the `stats.agn`, `linalg.agn`, `library.agn`, and `ansi.agn` files with respect to their error handling.

New functions and patches:

• `try/catch`: explicit specification of an error variable right after the `catch` token is now optional. If no error variable is given, then the error message is automatically stored to the local `lasterror` variable, and the `then` keyword must be left out:

  > try
  > error('oops !')
  > catch
  > more...