Make worker interval configurable
Merge pull request #42 from yohoushi/worker-interval

Make worker interval configurable
write configurable parameters on applicaiton.yml
make only restart_memory_usage for serverengine is effective
Merge pull request #43 from yohoushi/application_yml

[WIP] write configurable parameters on applicaiton.yml
Stop propagating click event to parent items
Merge pull request #44 from yohoushi/stop-toggle-when-click-link

[WIP] Stop propagating click event to parent items
Let's introduce lower_limit and upper_limit for graph parameter
Review: fix help message
Merge pull request #45 from yohoushi/fixed-y-grid

Let's introduce lower_limit and upper_limit for graph parameter
Update .travis.yml
Add INDEX path and (type, path) to nodes table

Specification in `20130605091736_create_nodes` to index nodes.path was not
valid. Also by adding (type,path) index, worker process and accordion tree get
fast! Furthermore I set key length limit for indexing because an index key can
be up to 767 bytes in InnoDB.
Merge pull request #46 from yohoushi/index

Index was missing
Add auto tagging option for graph
Add comment of Settings.graph.auto_tagging
Use try in accessing Settings
Use Settings.auto_tagging helper. Avoid uneccessary override.
Merge pull request #47 from avvmoto/auto_tagging_option_for_graph

Add auto tagging option for graph
trivial fix for better comment
fix travis