Remove unneeded function from Writer

Signed-off-by: John Else <john.else@citrix.com>
Rearrange code

Signed-off-by: John Else <john.else@citrix.com>
Add FileWriter module

Signed-off-by: John Else <john.else@citrix.com>
Add gnt_helpers module

Signed-off-by: John Else <john.else@citrix.com>
Add a skeleton PageWriter module

Signed-off-by: John Else <john.else@citrix.com>
Remove some boilerplate

Signed-off-by: John Else <john.else@citrix.com>