Update and rename gui_input12a.py to gui_input.py

change referenced main.py file from version specific "main12a.py" to general "main.py"
Update and rename main12a.py to main.py

changed referenced import of sh_modules from version specific "sh_modules12a" to general "sh_modules"
added routine for calculating junction specifications and creating junction_specs table
Update and rename sh_modules12a.py to sh_modules.py

Changed version specific name to general name
Added calc_ls_area and make_j_specs routines
Update main.py

last commit forgot to change all calls to version specific sh_modules ("sh_modules12b) to updated general name
Update main.py

Simplified reference names of raster files outputted to outputspecs text files; use file names instead of paths. 
Also inserted condition for previous files existence for deleting templatetempras
Update sh_modules.py

cleaned up debug print statements
Merge pull request #11 from Alexander-M-Waldman/master

First updates to original StreamHiker release