Support Multifile

[m1n1]

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[m1n1]

This is now supported since 6abdc2d and c79004c

To import a file use .import /folder/file.s from your main file. In the imported file you have to expose the labels to use with .globl exampleLabel. See also https://cs61c.org/fa19/labs/lab04/#transitioning-to-more-complex-risc-v-programs

On Windows only relative paths are available.
On Unix Both local and relative paths are available.

.import /folder/file.s //Relative import
.import <home/user/LinuxVM/riscv/file.s> //Absolute import

Before this is closed I think we need to do following:

• Test on MacOS
• Generally Test on more devices. So far only tested on local Windows Machine and Linux VM. Reading from Filesystems can always lead to errors due to different Permissions, System settings, and OS.
• Decide if Absolute Paths are necessary. If yes implement them on Windows.