added previously unsaved changes
slight simplification of mtz and scf constraints concerning in/outdegree

only marginal reduction of runtime
modified LDFLAGS to match cplex install more easily

The folder pointed to by the LDFLAGS variable does not exist in my install,
changed the ARCH variable so it contains the complete directory name.
My vars.in file looks like this now, which works:

CPLEX_DIR = [path_to_cplex]
ARCH = x86-64_linux#32bit: x86, 64bit: x86-64
GPP = g++
added constraint to mtz: force all inactive nodes to have order 0
found better upper bound for number of outgoing edges of an active node

use k instead of n
however, an even better bound would be k-u_i because at least u_i nodes
 are above the current node in the tree
This works better than using just k when k is small, worse when k is large
updated gitignore file
Apply outgoing edge upper bound to SCF as well
Tighter bound
TODO notes for tighter SCF bounds
Initial setup for MCF
Add comments describing upcoming MCF constraints
started report, general formulation and mtz done
removed unused tex output files
included b&b nodes in test.py output
ever tried ever failed. no matter?
not a substantial improvement of scf, but something
mcf works, but it is slow
improved comments
Move report to doc/ subfolder
Integrate report into our makefile