Simpler and more robust lap alignment
Fixed for empty lengths due to false starts and
pauses in some devices s.t. Garmin 910xt
Added 2 contributed test files
Use total duration for both length and lap messages to synch them,
even when using drill mode. Tested with Garmin Swim and 920xt files.
Garmin 310xt is special cased since it doesn't generate rest length messages
Add Pool Length in meters as metadata
Introducing a directory structure to make it a bit less
daunting for new developers and perhaps even old hands.
The main folders all start with an upper character, so src
files are now located in;
* Core - Core data structures
* Gui - Main GUI elements
* Metrics - Models and Metrics
* FileIO - Device and File I/O
* Charts - All the chart types
* Cloud - Working with Web Resources
* Train - Anything Train View specific
* ANT - Our ANT+ Stack
* Resources - Images, Translations, Web etc
Apologies to anyone who needs to merge across this update.
