First tries of creating MathValue trait
( what was left in the previous commit )
using a new approach for real, though not complete yet
fixed up Real trait, completed addition for primitive values (using double)
cleaning code up
added multiplication and began work on an interpreter that converts input text to a 'Real' expression
changed Android SDK version to API 15, started Button
started Interactive trait
out/production/traits/script.xml
Merge remote-tracking branch 'origin/develop-MW' into develop-JK

Conflicts:
	out/production/traits/script.xml
added more math, 4 basic operations are supported now, removed interpreter stuff as it is not needed for now
Merge remote-tracking branch 'origin/develop-MW' into develop-JK

Conflicts:
	out/production/traits/script.xml
Updated .gitignore and kotlin runtime
Merge remote-tracking branch 'origin/develop-JK' into develop-SN
updated Spek
Merge remote-tracking branch 'origin/develop-JK' into develop-SN
WIP android app / openGL
WIP shell example
added tests.shell
Merge remote-tracking branch 'origin/develop-SN' into develop-JK