fix, now text is stripped even when element changes
first structure view implementation
Merge branch 'master' into find_usage

Conflicts:
	META-INF/plugin.xml
	src/main/scala/amailp/intellij/robot/parser/package.scala
	src/main/scala/amailp/intellij/robot/psi/Keyword.scala
	src/main/scala/amailp/intellij/robot/psi/RobotPsiFile.scala
	src/main/scala/amailp/intellij/robot/psi/package.scala