update pre commit hook, remove unfunctional file
refactor intset

use abstract class for intset
add module that creates best class
cosmetics
fix mem leaks
renaming and cleanup of interface
rename fkt
Check for xdrop extensions of length 0

came up in #291
add getter fkt and tests
Closes #293.
fix typos
unify method names
gtlua: fix sequence extraction
gtlua: fix gt.translate_dna()
gtlua: add meta node accessors
add dev tool for spec checker
gtlua: add 'genome_node:get_line_number()'
add GtSpecResults
add gt_comment_node_(try_)cast()
add spec results support
add detailed spec check reporting