codebase / stimlib

make it render better for both swc and obj files

add a new function in circle class in order to get a close circle

See merge request !25

fix minor error for loading and rendering networks from swc files

See merge request !24

add swc.h and functions for loading networks from swc files

See merge request !23

add function to render the cylinders perfectly

See merge request !22

everything now is working for new cylinder

See merge request !20

Conflicts:
	stim/biomodels/network.h
	stim/math/filters/conv2.h
	stim/visualization/cylinder.h
	stim/visualization/gl_network.h

This reverts commit efbb4bf7ba5f0a91446a77e084e2ca7ab54aa859.

Conflicts:
	stim/envi/envi.h

Also updated stim::matrix to allow re-arranging of rows and columns, as well as saving to CSV files.