Merge pull request #887 from davidgiven/cpm

Overhaul the CP/M filesystem code.

Merge pull request #241 from wybren1971/patch-1

Update fe-writeibm.cc

Merge pull request #236 from erichelgeson/eric/typo

Fix minor typo

Merge pull request #233 from davidgiven/ibm

Refactor the IBM readers and writers.

Merge pull request #218 from hpingel/ibm_enc_swapsides_preset_1581

Adding preset for Commodore 1581 (cbm1581) to IBM writer frontend

Merge pull request #217 from davidgiven/writes

Update sequencer to not lose one tick from every non-zero interval.

Merge pull request #215 from davidgiven/ibm

Fix the timing when writing IBM 1440kB disks.

Add swapSides parameter to the Atari ST writer.

Merge pull request #203 from keithclark/atari-st-format

Write Atari ST formats

Merge pull request #212 from davidgiven/analysis

Rework the disk response analyser to draw its own graphs