Improvements since a8: fixed configure problems; new random number architecture; Tkenv usability improvements. POTENTIAL INCOMPATIBILITY because of changed signature of fullName().

Details:

- fixed configure script problems in alpha 8

- new random number architecture: support for Mersenne Twister and Akaroa RNGs; unlimited number of RNGs; RNG mapping (module-local RNG numbers can be mapped arbitrarily to physical RNGs from omnetpp.ini. Details in src/envir/ChangeLog and on omnetpp.org.

- Tkenv fixes and usability improvements: (1) allow user interactions during message animation: animation speed can be changed with the slider, STOP button can be clicked, inspectors can be closed, etc; (2) improved "Fast Run until next local event" function: now it always animates events that occur in the local module; (3) fixed display string handling bugs: in "t=", commas and equals signs weren't handled properly.

- signatures of fullPath() and info() functions changed to use std::string. The new signatures are both safer (no danger of accidental buffer overrun or confusion caused by using static buffers) and easier to use. POTENTIAL INCOMPATIBILITY: fullPath() calls in sprintf(), ev.printf(), new cException() etc calls should be changed to fullPath().c_str(). (ev<< statements are not affected.)

- support for categorized icons (icons grouped into subdirectories within the bitmaps folder) in GNED and Tkenv

- linking problems (linker symbol conflicts) with recent Akaroa versions resolved