improve comment finding (still very basic but better) fixes #70

git-svn-id: https://svn.r-project.org/ESS/trunk@5946 0bbaf3bd-34e0-0310-bf65-c717079852d4
do not skip over following comment line in roxygen blocks when stepping

git-svn-id: https://svn.r-project.org/ESS/trunk@5947 0bbaf3bd-34e0-0310-bf65-c717079852d4
do not strip out leading whitespace when removing roxygen prefix

git-svn-id: https://svn.r-project.org/ESS/trunk@5948 0bbaf3bd-34e0-0310-bf65-c717079852d4
add support to roxygen2 version 3.0.0

git-svn-id: https://svn.r-project.org/ESS/trunk@5949 0bbaf3bd-34e0-0310-bf65-c717079852d4
cleanup

git-svn-id: https://svn.r-project.org/ESS/trunk@5950 0bbaf3bd-34e0-0310-bf65-c717079852d4