primitive support for symbolic points
adopt test_issue_5654
More Order._eval_subs cleanup
Raise NotImplementedError for mixed points, e.g. O(expr, (x, 0), (y, oo))
Make Egyptian fractions a little more robust.

Add checking for negative arguments, and arguments > 1
Add check for legal input in egyptian fraction.

Reject numbers outside of (0,1), instead of trying to handle them.
Add Golomb's method for Egyptian fractions.
Use harmonic method for Egyptian fractions

Sum divergent series for values > 1.
Merge pull request #2427 from skirpichev/order-point

Order (and series) at point != 0 and oo
Added few changes
Added hashing for vectorAdd and VectorMul
Merge branch 'master' of https://github.com/sympy/sympy into basicvector
Merge pull request #7595 from skirpichev/fix-examples

Fix examples after removing deprecated Plot (see d804fd2)
Enhancements of the sin function
Enhancements of the cos function
Enhancements of the tan function
Enhancements of the cot function
Enhancements of the csc function
Enhancements of the sec function
Implementing common base class for inverse trigonometric functions