issue93: README.md file update / typos project.xml

The README.md file now stipulates that the license.xml file has
to be copied in order to generate a valid project.

The project.xml file contains typos for the main-entities.
Merge pull request #94 from fnchooft/issue93

issue93: README.md file update / typos project.xml
Problem: fragile to reinstall when project changes

The lack of generated makefiles in the project means that when we
add a new file, for instance, we have to re-run the entire build
process before installing. This continually trips me up since its
different from our normal workflow.

Solution: make zproject workflow look like the rest

(./autogen.sh && ./configure && ./make install)
Updated project makefiles
Merge pull request #95 from hintjens/master

Problem: fragile to reinstall when project changes
Problem: need linking to curve crypto library

Solution: add libsodium to list of defined projects
Merge pull request #96 from hintjens/master

Problem: need linking to curve crypto library
Problem: Class API models do not support constants
Solution: Add constants to models and generated @interface headers
Merge pull request #97 from jemc/master

Problem: Class API models do not support constants
Problem: No way to model abritrary private headers
Solution: Honor `private = "1"` in header items in project model
Merge pull request #98 from jemc/master

Problem: No way to model arbitrary private headers
Problem: lack support for zproto state machine animation

The zproto server/client state machines provide an animation option
which shows the state transitions. This is helpful for debugging any
errors in the state machines. This is enabled by passing -v to the
selftest (which passes a verbose argument to server/client classes).

Solution: add 'make animate' target that does a 'make check' with
verbose option.
Merge pull request #99 from hintjens/master

Problem: lack support for zproto state machine animation
Problem: The need of a license.xml isn't mentioned in the README
Solution: Explain how to include a license and what it is used for
Problem: Forgot to generate README.txt in README.md
Solution: use gitdown to generate it
Problem: Can't find .7 man page

Obnly this one is searched for in srcdir while still being generated
from txt file and thus being in builddir. Removing srcdir reference as
it breaks out of the tree build of czmq.
Merge pull request #101 from miska/master

Problem: Can't find .7 man page