Remove submodules;
Squashed 'thirdparty/src/glog/' content from commit 6baf383

git-subtree-dir: thirdparty/src/glog
git-subtree-split: 6baf38392c69d87f97851a1b74a8a48aaa9a6339
Merge commit '810de7a4ddb05e893c2883a5b205ff3da4026a30' as 'thirdparty/src/glog'
Squashed 'thirdparty/src/gtest/' content from commit c0b9b58

git-subtree-dir: thirdparty/src/gtest
git-subtree-split: c0b9b58b972500e4228034e0e038e165b51f06d4
Merge commit '6936ab074278edb4950802155cb88eac2e3c2e95' as 'thirdparty/src/gtest'
Merge commit 'cdf873cc76ab8218ddeda34d82de432b50107123' as 'thirdparty/src/kyotocabinet'
Squashed 'thirdparty/src/kyotocabinet/' content from commit 36a7dc6

git-subtree-dir: thirdparty/src/kyotocabinet
git-subtree-split: 36a7dc6e47143c110ddf00d702f8f0b18ffffc7c
Squashed 'thirdparty/src/marisa-trie/' content from commit 07eab0b

git-subtree-dir: thirdparty/src/marisa-trie
git-subtree-split: 07eab0bfe0df67dd2b9fabb046557be79b2bbfee
Merge commit '93b8c8418cd91fa4c81d8814e395f5f1234a8ea8' as 'thirdparty/src/marisa-trie'
Squashed 'thirdparty/src/opencc/' content from commit f901d8b

git-subtree-dir: thirdparty/src/opencc
git-subtree-split: f901d8bce3a8ec0dac778b7be90de7ffb0450abd
Merge commit '0e58726780e9fa868d8182976ab911b867a12e27' as 'thirdparty/src/opencc'
Squashed 'thirdparty/src/yaml-cpp/' content from commit aad7d74

git-subtree-dir: thirdparty/src/yaml-cpp
git-subtree-split: aad7d748b7d0a8d9d2168ff946268c82d8bcbf7c
Merge commit '7e9e7135d42cf55840a78c940d1c4e94bdd0ea38' as 'thirdparty/src/yaml-cpp'
Merge branch 'subtrees' into develop
Fix link error when building kyotocabinet on OS X due to overriding LDFLAGS.
kyotocabinet: fix 'make distclean'.
Clean generated files under thirdparty/src.
Squashed 'thirdparty/src/kyotocabinet/' changes from 36a7dc6..961e2a4

961e2a4 kyotocabinet: fix 'make distclean'.

git-subtree-dir: thirdparty/src/kyotocabinet
git-subtree-split: 961e2a42e0fb7fec345bde075747f803c55404a7
Merge commit '3a7d95531b788e3d3f4b1765b598899c150d4e90' into develop