Merge branch 'release/0.5.2' into develop
fix code style
Merge branch 'master' into develop
fix bit_index_storage to erase rows with empty vector on MIX
fix bit_index and inverted_index erase rows locally
Merge branch 'develop' of https://github.com/jubatus/jubatus into develop
fix recommender get_all_rows distribution mode to random (fix #683)
disable checking ID when loading models (fix #679)
Use const reference in aggregators
Remove unused function
eliminated ::log ::exp ::sin ::cos ::pow ::ceil ::sqrt
add cmath_finder.sh which greps whole source tree
Merge pull request #688 from gintenlabo/fix-680

Use const reference for aggregator arguments (implements #680)
util::vector's abs is member function
abs for user-defined type should not be std::abs
Merge pull request #689 from jubatus/feature/eliminate_cmath

Eliminate cmath
replace map with unordered_map
Merge pull request #687 from jubatus/fix-679

disable checking ID when loading models (fix #679)
Remove serialization methods for clustering
Make __repr__ function instead of __str__