allow to disable flock(2) with GT_NO_FLOCK
ref feature nodes coming out of GtFeatureInStream
fix test cases for GtFeatureInStream

Ownership of the test nodes needs to be held by the
feature index to mimic the effects of a feature out stream
pull.
Merge pull request #231 from gordon/noflock

allow to disable flock(2) with GT_NO_FLOCK
Merge pull request #227 from Garonenur/alignment_show

Alignment show
Merge pull request #232 from satta/daniel-streams

ref feature nodes coming out of GtFeatureInStream
optimize editscript
fix gcc uninitialized error