GitLab

    - fixing number of particles when the numbers don't add up to the total due to rounding errors;
    - clean up: rename files to comply with coding guide lines;
    - improve message when field of bend overlapps;
    - warning is emitted if too few fourier coefficients are used to filter the field map;

- remove 'using namespace' from header files
- remove 'using std::string' and 'using std::abs' from header files

For reason see:
o http://stackoverflow.com/questions/5849457/using-namespace-in-c-headers

in svn+ssh://savannah02.psi.ch/repos/opal/tests/trunk/Collimator 

 - Now we have to check again aginst FLUKA and mabe mcmpx (ToDo: Y. Bi)

 - In the collimator physics class the start of the collimator in floor coordinates is wrong
    is always 0.0 (ToDo: A. Adelmann)

- In the collimator physics class there is a duplocation of the actual collimator code, this needs to be elliminated (A. Adelmann)

- One has to check the CCollimator (ToDo: J. Yang)

		MINR, MAXR, MINZ, MAXZ. 
- if a particle is out of cyclotron aperture or out of the field map, 
   it will be deleted after this step and its parameters are recorded in the *.loss file
- change data type of particle id from int to size_t
- many minor cosmetics of display massage

- use forward declaration where possible
- remove unused includes