add cleanindexes target
use cleanindexes target
check for gtlib loadability before running gtruby/gtpython tests
Merge pull request #221 from satta/python-3264

only run scripting language tests when possible
remove debug output
Merge pull request #222 from satta/python-3264

remove debug output
cosmetics
fix documentation for testing
Merge pull request #223 from Garonenur/dw

small cosmetics
gt encseq info:
tests and bugfix for n50 values
gt encseq info
previous n50 value is in fact l50-count
print n50 as min.length of largest sequences covering 50% of total seq-length
gt encseq info
remove unused variable "n50_count"
touches genometools/genometools#216
fix n50 test routine
create encseq before info output
Merge pull request #216 from joergi-w/hiwi

gt encseq info: tests for n50 values and bugfix for n50_sum