website: update for new 0.18.1 release
bump version number after new release
draw-tools plugin: new feature - snap points to portals
useful to fix badly placed lines/polygons
[draw-tools] Fire native drawtools events in import/reset/snap; smaller bugfixes
[sync] bugfix (file wasn't created if not found)

also, set sync delay to 5 seconds
fix debug log: it's getEntities now, not getThinnedEntities
neutral portal colour: change to a slightly redder orange - so that anomaly portals with cluster markers in orange don't get quite so lost. it's not so red that the red cluster portals become an issue
update tiles-per-edge to match change to stock site
fix gamescore loading - minor data format change
Revert "[draw-tools] Fire native drawtools events in import/reset/snap; smaller bugfixes"

This reverts commit 1f8f5360406e1b2b0597915357096f968ed5fc0c.
draw-tools: create clones of latlng objects - otherwise drawn items end up with copies of thise form portals, which editing can cause the portal merkers to move!
various tweaks to how IITC requests data tiles from the servers
- change TILES_PER_REQUEST to 25, instead of 10 - to match current stock intel site
- modify the zoom level faking IITC does. it still makes good use of IITC's caching, but no longer switches to a zoom level with larger tiles. recent changes to tile parameters for L8 portals on the standard intel site suggests that it's nicer to the servers to request more, but smaller, tiles, than fewer but larger ones
- restored the 'show less portals when zoomed out' plugin. however, this works differently now. rather than faking the zoom level for larger tiles, it now effectively applies the portal level filter used by the standard site. just as many requests as stock, but much smaller responses with fewer portals, so faster rendering
the recent increase of TILES_PER_REQUEST means more error: TIMEOUT responses for tiles. they are, again, 'normal'
so reduce the retry delay on these close to the delay used after successful requests.
Merge branch 'master' into release