Add changes to install backend section

[tulikavijay]

issue : #60

Actual result :

Getting distribution for 'mr.developer==1.34'.
Got mr.developer 1.34.
Getting distribution for 'zc.buildout==2.5.2'.
While:
  Installing.
  Loading extensions.
  Getting distribution for 'zc.buildout==2.5.2'.

An internal error occurred due to a bug in either zc.buildout or in a
recipe being used:
Traceback (most recent call last):
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/buildout.py", line 2123, in main
    getattr(buildout, command)(args)
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/buildout.py", line 637, in install
    self._load_extensions()
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/buildout.py", line 1163, in _load_extensions
    newest=self.newest, allow_hosts=self._allow_hosts)
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/easy_install.py", line 920, in install
    return installer.install(specs, working_set)
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/easy_install.py", line 721, in install
    for dist in self._get_dist(req, ws):
  File "/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg/zc/buildout/easy_install.py", line 577, in _get_dist
    dist = self._env.best_match(requirement, ws)
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 1111, in best_match
    dist = working_set.find(req)
  File "build/bdist.linux-x86_64/egg/pkg_resources/__init__.py", line 715, in find
    raise VersionConflict(dist, req)
VersionConflict: (zc.buildout 2.10.0 (/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg), Requirement.parse('zc.buildout==2.5.2'))

Expected Result :

No conflicts

Description of PR:

    raise VersionConflict(dist, req)
VersionConflict: (zc.buildout 2.10.0 (/media/ajayns/Projects/Code/xPR/plone-react/api/eggs/zc.buildout-2.10.0-py2.7.egg), Requirement.parse('zc.buildout==2.5.2'))

Clearly states that there is a version conflict - the buildout file after running some set up steps requires
zc.buildout==2.5.2 but the version we have in the egg is 2.10.0 .

Updating the documentation for installing local dev.

[tisto]

@tulikavijay the docs are actually outdated. Here is what you should do:

virtualenv .
bin/pip install -r requirements.txt
bin/buildout

[coveralls]

Changes Unknown when pulling a6f4a41 on tulikavijay:master into ** on plone:master**.

[coveralls]

Changes Unknown when pulling a6f4a41 on tulikavijay:master into ** on plone:master**.

[ajayns]

@tisto Shouldn't this PR be merged? The docs are outdated. @tulikavijay You actually should've created a new PR maybe

[robgietema]

Docs are updated in another PR.