Refactoring

Split off the memory access code into a "Memory" class.
Rename a bunch of things to be more clear such as the menu items.
Move the startup dialog to be accessed via About... in the context menu.
Use enums for the settings options.
Stop using arrays for memory addresses, use selects and constants.
Rename a couple more methods
Move the public method GetValue in Memory up
Rename curr to current.
Move string percent/value creation into helper methods
Have Memory remember which process it is attached to and auto-detach when moving to a new one
Add back the % sign I dropped by mistake
Add memory addresses to the settings dialog and rename some settings to be more clear
Add variables to the memory class for the focus and target addresses

When saving the settings form, or starting the app, set the memory addresses
from the settings form.
Add danakj to the About dialog
Update tooltips for the new settings labels
Merge pull request #4 from danakj/master

Overhaul.