minor modification of access.py
Modify the comment lines of chow matrix in matrix_repository.py
remove import numpy as np from the comment lines of hilb matrix in matrix_repository.py
Initial the directory base/
Delete all .pyf files from the directory matrix-repository.py
Change VPATH to ../src/base, ../src/util and base/
Merge pull request #9 from matrix-repository/master

add subcollections