fix typo
Merge branch 'multitrack'
Merge branch 'multitrack'
Merge branch 'multitrack'
Merge branch 'multitrack'
Merge branch 'multitrack'
Merge branch 'multitrack'
Merge branch 'multitrack'
Update README.md

add numpy version number (as apparently not compatible with 1.6)
Update README.md

update more versions
Merge branch 'master' into development