MAINT: Move 'clean' target to bottom of Makefile.
MAINT: Updated version info in README.
MAINT: fixed formatting in getting started guide.
MAINT: removed unused Cython patch.
DEP: Remove explicit support for older versions of Cython.
DOC: Updated build instructions.
Merge pull request #48 from enthought/maint-small-updates

[WIP] Small maintenance tasks