Whitespace cleanup

Minor change to the perl postprocessing script and resulting changes to
the affected source files.

This deals with two issues:
- "foreach"-like structures were not always treated correctly
- some longer calculations that ended on "+ constant" were reformatted in
  a rather unatractive manner

In one source file (divelist.c) I ended up adding braces to the sources...
trying to cascade the indentation further down without having the block
there seemed a lot more trouble than it's worth.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Depth widget minor UX improvement

Decrease depth by tapping left part of widget. Icon is showing "up" (i.e. closer to surface).
Increase depth by tapping right part of widget. Icon is showing "down" (i.e. deeper).

Fixes #354

Signed-off-by: Andrey Zhdanov <andrjufka@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Update the README file part about commit messages

Link to the official home of the developer certificate of origin and
clarify some details about commit messages, as discussed on the mailing
list.

Signed-off-by: Thiago Macieira <thiago@macieira.org>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Remove pointless assignments

tissue_tolerance wasn't used after it was assigned.
type was overwritten after it was assigned.
serial was overwritten after the last /= 100.
event is assigned in the for loop.
clear isn't used after the assignment

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Don't use negative gas index

This shouldn't happen, but in case we run out of gases we shouldn't use
the negative gas index (which is the error return of get_gas_idx()) for
the array. Let's fall back to the (incorrect) first gas.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Don't use error after free

We need to reset the error pointer to NULL for this to work.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fix possibly uninitialized value

I'm not sure about this one. It's possible that there's something
happening behind the scenes that I don't understand. But let's just
initialize this to 0 and be sure.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Reorganise buttons in profile panel

- Move the buttons of the profile window around to have more sane positions.
- All the buttons affecting the ceiling(s) are now grouped together.
- All the buttons affecting the Information Box are now grouped together.
- The previous icon for "Show calculated ceiling" has been reassigned to
  "Show all tissues"
- A new stand-in button hav been included for "Show calculated ceiling"

Signed-off-by: Willem Ferguson <willem@willem-Precision-M4700.(none)>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Changes to icons in profile panel

- Replace dustbin icon.
- Replace NDL/TTS tool tip with "Show NDL / TTS"
- Create tool tip for scale icon: "Rescale depth axis"

Signed-off-by: Willem Ferguson <willemferguson@zoology.up.ac.za>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>