Implemented setting path to Assembler and Simulator from environment variables ROPE_ASSEMBLER and ROPE_SIMULATOR if they are set.
Implemented setting path to default sources folder from environment variables ROPE_SOURCES_DIR if it is set.
Some fixes in AssemblerDialog class.
Some changes in Rope and RopeFrame classes.
Implemented setting path to Assembler and Simulator from environment variables ROPE_ASSEMBLER and ROPE_SIMULATOR if they are set.
Implemented setting path to default sources folder from environment variables ROPE_SOURCES_DIR if it is set.
Some fixes in AssemblerDialog class.
Some changes in Rope and RopeFrame classes.
Merge origin/master