comments and bug fixes in SLPset
SLPSetTest stub
Merge pull request #1 from pmorar/slpset

First implementation of SLPSet
Unittest framework added
Merge changes proposed by pmorar
Merged changes from master
SignedVertex && SignedVertex::Null
Added eclipse project files to gitignore
Basic signed vertex implementation
Renamed ProgressionTale to SLPMatchingTable
std::hash realization for pair of signed vertices
Implemented simple tests for SignedVertex
Tests for hash(std::pair)
Multiple refactoring. 
Now it is almost great.
Null.negate() is exactly the same as Null

Test are rewrited after refactoring.
Several fixes to link successfully
Some fixes to link unittest with libs
Merged makefile fix from master
Merge branch 'SLPs' into SLPSet/smartptr