change data struc to fit b+ tree
change data struc to fit b+ tree, still compatible
Merge branch 'v0.47-bptree-template' of https://github.com/sleepsort/se into v0.47-bptree-template
cleanup codes for bptree template
prepare to roll
use mask bit for dirty & lock states
support fix size array
support data in leaf, however the tree is still not b+
support data in leaf, however the tree is still not b+
Merge branch 'v0.47-bptree-template' of https://github.com/sleepsort/se into v0.47-bptree-template

Conflicts:
	src/main/test.cpp
	src/template/btree.cpp
b+ tree, pass long long and char test
pass char[] test
Merge branch 'v0.47-bptree-template'

Conflicts:
	src/main/index.cpp
	src/main/test.cpp