Fix minor bugs of QG and QBG

v2.0.7

fix minor bugs of QG and QBG

Update the way to specify the build parameters

v2.0.6

update the way to specify the build parameters

Add functions to QBG C APIs and some trivial updates

v2.0.5

add functions to QBG C APIs

Update setup.py to build ngtpy_qbg for QG and QBG

v2.0.4

update setup.py to build ngtpy_qbg for QG and QBG

Update setup.py to build ngtpy

v2.0.3

update setup.py to build ngtpy for a pypi distribution

Update QG and QBG search

v2.0.1

update QG and QBG search

QBG is available

v2.0.0

QBG is available

Fix the issue #118

v1.14.6

fix the issue #118

Add the functions to the number of objects.

Add Index::getNumberOfObjects() and ngtpy::get_num_of_objects().

Fix bugs of range queries for ngt-qg

v1.14.3

fix bugs of range queries for ngt-qg