To Do list, in somewhat priority order

[bgailleton]

• refactor the status updates to a log (c70fdab)
• Deal with reloading issues: either disable reloading or find a way to reinitialise everything (8a74829)
• Add a button to launch analysis rather than running them automatically at changes (72a4747)
• Action to reinitialise plot with a different hillshading (e647e85)
• Fix visual bugs and add buttons to come back to the analyser (630a715 d1a47d5)
• add river extraction (dd02127)
• Add drainage divide extraction and plotting