backupninja: update homepage
tor: use Formula[]
Use Formula[] in example formula
Remove requested? dependency magic
Apply cyclic dependency hack unconditionally
Add set union to Options
Clean up FormulaInstaller#install_dependency
Pass expansion-time build options to install_dependency
Eliminate mutation of Dependency objects
Cache and reuse Dependency objects
Set owner ivar in SoftwareSpec
lsyncd: add resource for 10.9.2
lsyncd: fix typo