Corrected if block verificator in interpreter
Corrected if block verificator in generator
Added new error messages translitions
Merge pull request #968 from dvvrd/robots

Correct verification for if block
Fixed #974
Merge pull request #977 from dvvrd/robots

Fixed #974
Fixed #978
Fixed #980
Merge pull request #979 from dvvrd/robots

Fixed #978
Merge pull request #981 from dvvrd/fix980

Fixed #980
styleguide fixes
Merge pull request #970 from qreal/labelsFix3-scene

Labels fix stage 3 --- scene
Merge branch 'master' of https://github.com/qreal/qreal into #677