Pymathematics

CHANGES:
1. matrix.multiply(matrix_,const,dimension = 1) added
2. matrix.reciprocal(matrix_,dimension = 1) added
3. matrix.remove_column(matrix_,column) added
4. matrix.remove_row(matrix_,row) added
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CHANGES:
1. changes in vector class
2. nan and inf constants were added
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CHANGES:
1. sets class added (union,subset,belongsto,toset,intercept) functions
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CHANGES:
1. kurtosis() added
2. skewness() added
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CHANGES:
1. vector class were added
2. constants.exp is now constants.e
3. reciprocal() added
4. accuracy() added
5. changes in sqrt() return 5 decimal numbers
6. algorithm change in summation()
7. median() added
8. bubble() sort added
9. quick() sort added
10. descending_sort() added
11. slope_intercept() added
12. min_max() added
13. mean_error() added
14. power() added
15. power_array() added
16. power_sum() added
17. primes() added
18. isprime() added
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INITIAL RELEASE
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