refactored vector's norm implementation
rolled back to 0.4.9
refactored min/max funcitons for vectors
updated javadoc for vectors
refactored min/max for matrices
refactored vector's assign method
updated javadoc
added tests for norms
removed deprecated methods from vector
changed version in changelog
fixes #149
fix #152
Make solution more general; add wider range of serialisation test cases
blah
Merge pull request #153 from cdagraca/master

Fix deserialisation bug on CCSMatrix; Fixes #152
added credits for Catherine