Merge branch 'release/0.2.1' into develop
refactoring
new svg renderer svg.py and seqsvg.py
add x-scaling for svg.py
delete old seqtrack.py
font size adjuster and misc svg fix.
refactoring
Merge branch 'feature/svg' into develop
no primer resutls
length threshold
add some scripts
use buildout instead of virtualenv+pip
make some sub directory in module.
delete unused files.
add AnnotatedSeq
clean code.
rename
add --open flag
fix warnings.
tweak