fix invisible rope in low quality

converts some gl calls to gles

- Remove cake fix - Restore negative zero in hwSign

Fix cake going wrong way bug (triggered by disallowing "negative zero" in hwSign)

Final fix

Second try

Fix build

Fix a warning

Don't spam debug messages

Optimize network traffic a bit: - Send keepalive packets every second - Don't send keepalive packet if there was action packet within a second Time between turns in net game is reduced to 1 second now (was 2 seconds)

Don't store keepalive messages in game server spectators buffer

- Fix join/leave messages color - Add a check to prevent local schemes from overriding with bad ones

- Implement zoom reset - Implement mouse wheel events processing - Increase zooming speed twice - Bind zoom to mouse wheel, zoom reset to middle mouse button - Some formatting changes (yes, I'm evil :D )

Fix water rendering issues

And in frontend

Strip trailing spaces

Don't allow to look too deep

Fix water position when zooming

Fix background and horizont positions when zooming

Implement smooth zoom

Fix broken infinite skip turns logic

- Support probabilies from ammo scheme in engine - Remove shoppa probabilities hack

Implement probability editor for weapon schemes (engine doesn't support that yet)

Move connect call to more appropriate place

Remove gstHHDriven flag when hedgehog get into the water. Fixes some odd cases.

Disable smoothing and alpha for low quality rope rendering

Some rope tweaks

Fix braindead check

Use GL_LINE_STRIP instead of GL_LINES

- Implement low quality rope - Sometimes doesn't render - to be fixed