fix wrong line numbers in GtSequenceBuffer errors
Merge pull request #184 from satta/wrongline

fix wrong line numbers in GtSequenceBuffer errors
add unsafe mode to GtScriptFilter
add option '-retainids' to select tool
add Start_range and End_range attribute support
Merge pull request #188 from satta/scriptfilter

improve script filters and gt select
Merge pull request #189 from satta/start_end_range

add Start_range and End_range attribute support