first implementation of N2 condensing with general Weighting matrices + expansion of lagrange multipliers, potentially for exact Hessians
enhanced integrator MEX interface regarding three-sweeps-propagation
finished N2 condensing for exact Hessians
fixed forward_over_backward propagation
added a warning message for new N2 condensing related to state bounds
fixed bug related to online data and projections
Merge branch 'master_2.0' of github.com:borishouska/acado into master_2.0

Conflicts:
	src/symbolic_operator/projection.cpp
Merge branch 'master_2.0' of github.com:borishouska/acado into master_2.0
typedef related to maps
fix for g++ 4.7
updated loops example
reimplementation of the loading and evaluation process for symbolic operators: merging the advantages of ACADO 1.0 and 2.0
removal of old template map and use of unordered_map instead
minor improvement loading of tree_projection
fixed bug regarding the inputs of a function
indroduced shorthand for std:map<Operator*,T>