build fix in metamodel.dll
Merge pull request #3 from DmitriyChernov/buildFixMetamodel

build fix in metamodel.dll
Added default empty value to edge condition
Some documentation fixes:
Fixed pictires transparency;
Refreshed blocks screenshots;
Added wait blocks descriptions
Fixed terribelly large sensor rereading interval
Version changed to 2.0.3;
Documentation version and year scripting fixes;
Fixed nxt-tools installer wrong target directory
Added forgotten changelog point
Finally fixed help url path
Added logging into file
Merge branch 'robots' of https://github.com/dvvrd/qreal into robots
Finally fixed 2D model touch sensor collision detection
Fixed segfault when sensor not configured
Syntactic documentation correction
Fixed usability testing asseration fault
correct mistakes
Merge remote-tracking branch 'trunc/robots' into buttons
merge