bump version to v1.7.0dev
Search for patch file in directory of the easyconfig file

If you use a easyconfig outside of the python tree and there
is a patch file in the directory of the easyconfig, easybuild
will find it.
Remove temp git directory

Currently, /tmp fills up with empty /tmp/git-wc-* directories. This
commit makes sure that this directory is also removed.
Update error RegExp to decrease false positives

Currently, things like "-Wno-error" give a false positive on possible
errors in the compilation process. This commit fixes this.
added aclocal path to req_guess
keep track of all extensions to correctly define  in module
make sure clear message is shown as to why extension sanity check fails + minor refactoring
Merge pull request #671 from boegel/list_all_exts

keep track of all extensions to correctly define $EBEXTSLIST in module
Merge pull request #667 from wpoely86/develop

Search for patch file in directory of the easyconfig file
Merge pull request #669 from wpoely86/my-changes

Update error RegExp to decrease false positives
Merge pull request #670 from JensTimmerman/aclocal

Aclocal
Merge pull request #672 from boegel/sanity_check_msg_exts

make sure clear message is shown as to why extension sanity check fails
only initialize config in setUp, not on import of test module; run options unit tests first
make config.get_modules_tool() and modules.modules_tool() robust against uninitialized config (fixes #674)
Added functions to unset some env vars while building

The EasyBlock class now has a member unwanted_env_vars which has list of
environment variables to unset before building. They are restored after
the build completes.
Moved read_environment to tools/environment

Moved read_environment from tools/utilities to tools/environment.
Moved filetools/modify_env to tools.environment

Moved modify_env from tools/filetools to tools/environment
Updated old deprecated message for read_environment

Moved from config -> utilities -> environment
make sure we obtain the correct type of logger object (EasyBuildLog, not FancyLogger)
correct import statements for modify_env and read_environment (import from easybuild.tools.environment now)