Add test test_J14
Add test test_J9
Add test test_J8
Add test test_J7
Add test_M21
Add test M22 and comment about M16
Add tests M23, M24, M26
Add M27-M39
Add tests N1 - N11
Changed tabs
Merge branch 'issue694'
Merge branch 'master' of git://github.com/sympy/sympy into issue694
Merge branch 'master' of git://github.com/sympy/sympy into issue694
Add several tests in part M
Use solve(), not reduce_inequalities().
Add systems
Merge branch 'master' of git://github.com/sympy/sympy into issue694
Rewrite XFAIL tests
Merge branch 'master' into issue694
rewrite test_M27
add title of section N