remove superfluous script change_toolkit.py, replaced by command line options like --toolkit and --amend

Conflicts:
	easybuild/build.py
	easybuild/easyblocks/w/wrf.py
	easybuild/framework/application.py
	easybuild/framework/easyconfig.py

fix pick_version (avoid crashes when no less recent versions are available); take a deep copy of the specifications passed to select_or_generate_ec such that it doesn't get updated on the caller's end; make match check stricter, also take into account parameters that are not set in selected easyconfig; correct updating of toolkit with specified version; mention old version in comment for tweaked parameter values

implement support for using template easyconfig file when no easyconfig for given software name are available; provide a reasonable template easyconfig file

clarify need for unique function, fix generated filename for easyconfig, fix adding new parameters to easyconfig via --amend

hotfixes for bugs in develop

hotfixes for bugs in develop: EB_ifort was using incorrect class for icc, EasyBuild was exiting when no easyblock was found instead of falling back to Application class as a default

CGAL complains about missing QGLWidget

fix install directory permissions

Merge branch '145_OpenFoam_permissions' of github.com:boegel/easybuild into 145_OpenFoam_permissions

Conflicts:
	easybuild/framework/application.py

put easyblocks in easybuild.easyblocks namespace

 We will just try to import the easyblock when none is defined, if this fails, fall back to application.
 Since we can't know where the easyblock is actually located, it could be anywhere in __path__
 So let python figure this out.

removed first letter from the module_path_for_easyblock function, since everything is in the easybuild.easyblocks namespace now

change --amend command line option, so it can be used multiple times and a list of provided values is being constructed

Conflicts:
	easybuild/easyblocks/o/openfoam.py
	easybuild/tools/filetools.py

both when a group is specified (no access for others), and without (remove write permissions for group/others);
add stub config parameter for specifying that install dir should be made read-only after installation, and make that changes if the EasyBuild config dictates so

pasha needs libstdc++

fix making full OpenFOAM installation dir accessible to others (everything readable, dirs executable)

port support for BiSearch and Primer3

fixes in Pasha and tbb + apply patch for recent libstdc++ with intel compilers aswell (closes issue #142)

start working on getting generate_ec_file to support both selecting and generating of easyconfigs;
add (very) preliminary support for --amend, as suggested by @fgeorgatos