microeco v0.10.0

1.fix the bug for spieceasi glasso method in cal_network
2.optimize the network construction of spieceasi method
3.change cal_cor NULL for non-cor methods in trans_network
4.add errorbar_width parameter in plot_line of trans_abund
5.modify the print function in classes
6.change parameter names in plot_diff of trans_alpha
7.add label_text_size parameter in plot_diff of trans_alpha
8.fix the bug of anova when one measure is used in cal_diff of trans_alpha
9.check group names when add_sig = T in plot_diff_abund