Potential issue with path concatenation on OSX

[sarmento]

I have just installed xbTools, and I am facing an issue that may be related with Windows vs osX path definitions.
My script is:

from xbTools.xbeachpost import XBeachModelAnalysis

results = XBeachModelAnalysis('Test', '/Users/lsarmento/xbeach/xbtools_test')
print(results.metadata)

The result from:

python xbtools.py 

is:

Traceback (most recent call last):
  File "xbtools.py", line 7, in <module>
    results = XBeachModelAnalysis('Test', '/Users/lsarmento/xbeach/xbtools_test')
  File "/usr/local/anaconda3/lib/python3.8/site-packages/xbTools/xbeachpost.py", line 39, in __init__
    self.get_metadata()
  File "/usr/local/anaconda3/lib/python3.8/site-packages/xbTools/xbeachpost.py", line 60, in get_metadata
    with open(self.model_path+'\\XBlog.txt') as file:
FileNotFoundError: [Errno 2] No such file or directory: '/Users/lsarmento/xbeach/xbtools_test\\XBlog.txt'

Looking at the source code of the class, it seems it may be related with this line:

        with open(self.model_path+'\\XBlog.txt') as file:

which I believe is not capable of handling non-windows paths.
Potential fix: use os.path.join instead of string concatenation:

with open(os.path.join(self.model_path,'XBlog.txt')) as file: