rename run_tests.jl to runtests.jl
use SVG logo for travis status
slight performance improvement of Disjoint set implementation
fix `@test_throw` warnings
remove a code_native statement in disjoint_set.jl
Remove trailing whitespace
Add more constructors for Trie
Tests for Trie constructors
Add path(::Trie, ::String)
Add test for path(t::Trie, str)
Iterator implementation of path
Remove trailing whitespace