implement require-tree-finder
fix bug that open-asset can't open RequireTreeFinder
update spec
cleanup unused line break
rename from require-tree-finder to sprockets-finder
fix typo
refactoring
rename from SprocketsFinder to AssetFinder
describe require_tree to search for subdirectory
Merge pull request #31 from hmatsuda/open-asset-command-to-open-require-tree-finder

Open asset command to open AssetFinder when current line contains 'require_tree'