Create data directives in disassembler

The last part of the disassembler additions. This takes data definitions from the symbol map into account during the analysis.

![psp10](https://f.cloud.github.com/assets/4809758/1635955/bf27d1b2-57bc-11e3-9ad0-1edbdf2fbf9e.png)

For 32 bit values it tries to find a matching symbol to display instead of the number.