Merge pull request #45 from 0xe2-0x9a-0x9b/master

Go release.r59, and 1 previous commit
Merge branch 'master' of github.com:remogatto/gospeccy
Merge pull request #46 from 0xe2-0x9a-0x9b/master

Minor code cleanup and slightly faster (not perceptible) GoSpeccy initialization
Merge pull request #47 from 0xe2-0x9a-0x9b/master

Use "bitbucket.org/binet/go-eval/pkg/eval" instead of "exp/eval"
Merge pull request #48 from 0xe2-0x9a-0x9b/master

Compilation without SDL
Merge pull request #49 from 0xe2-0x9a-0x9b/master

GoSpeccy 0.8.0
Merge pull request #50 from 0xe2-0x9a-0x9b/master

Some changes to configuration handling
Merge pull request #51 from 0xe2-0x9a-0x9b/master

Add package comments (for http://gopkgdoc.appspot.com/packages)
Merge pull request #52 from 0xe2-0x9a-0x9b/master

Fix installation procedure in README.md
Merge pull request #53 from 0xe2-0x9a-0x9b/master

Minor update to WOS search, run gofmt
Merge pull request #54 from 0xe2-0x9a-0x9b/master

OpenSE BASIC
Change conventions for sna, tap, zip loading. Now all go in 'programs' folder.
Fix tests
Update README
Fix opcodes_gen.go and pull out Z80 cpu emulation in a dedicated package
Add z80 package
Remove backup files
Update the emulator in order to use the new z80 dedicated package
Fix z80 package import string