Begin feature/filesystem.
Add io.dopen lua function.
Add io.dclose lua function.
Add fs.c to Tupfile.
Add function in spm_script* to allow developers to easily add C
functions to lua libraries.
Add functions 'dclose' and 'dopen' to 'io' library table.
Add simple dependency definition
Fix spm_script_error undefined behaviour.
Fix undefined script behaviour
Move fs to script/fs
Fix various bugs
Fix misnamed function in script.c
Fix not recompiling after header changes in src/script/
Merge branch 'feature/filesystem' into develop
Fix addpayload script copying header files and library files into
archive.