re-added legacy optimizer for spring meshes, this would reproduce
tree070a6fe694d2e06023dcea603b71ab2491588119
-rw-r--r-- 47 .gitignore
-rw-r--r-- 2149 .mailmap
-rw-r--r-- 11819 DownsamplerTest.java
-rw-r--r-- 659 README
drwxr-xr-x - T2-NIT
drwxr-xr-x - T2-TreelineGraph
-rw-r--r-- 748 TODO
-rw-r--r-- 521 TODO.ElasticAlign
drwxr-xr-x - TrakEM2_
drwxr-xr-x - VectorString
-rwxr-xr-x 42 grep
-rw-r--r-- 1554 pom.xml
drwxr-xr-x - test