Merge branch 'source' of https://github.com/LAX18/NOS into source

Fix varibles -> variables

README.md

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-# NOS
-A alternative shell for the TI84+CE

build.bat

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-@ECHO OFF
-ECHO NOS Developers Custom Installer
-ECHO Starting Builder...
-ice NOS.8xp
-ECHO Success!!!
-Pause

developers.md

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+## Developers Information  
+This page has information relating to developers and what they can and cannot use.
+  
+### Contents:
+System Variables  
+Modules  
+Built-In Calls and Labels  
+
+## System Variables
+NOS has a decent amount of system variables and labels that cannot be overwritten. Below is a list of them and their location (what subprogram they are in) and whether or not they can be overwritten.  
+  
+### NOSSPRIT    
+No Variables  
+  
+### NOSHEAD  
+No Variables  
+  
+### NOSSRH  
+FILES - This has the program names and the data. This is in the format of a 17 byte set as seen below:  - DO NOT OVERWRITE -  
+  0-7 - Program Name  
+  8 - Zero Byte (help with reading program name)  
+  9 - Archive Status  
+  10, 11 - Saved for future features  
+  12 - Icon Status (:DCS Header)  
+  13 - Size  
+  16 - ASM or BASIC  
+I, F, X, D, P - Temporary Variables, you can overwrite these after  
+TBPRGMS - Total BASIC Programs - DO NOT OVERWRITE -  
+TAPRGMS - Total ASM Programs - DO NOT OVERWRITE -  
+BASIC - List of BASIC programs, follows above syntax (see FILES)  
+ASM - List of ASM programs, follows above syntax (see FILES)  
+TPRGMS - Total Program Count - DO NOT OVERWRITE -  
+OFFSET - Offset for Copy() - Okay to Overwrite -  
+SIZE - Size of first program, this may be overwritten after the program is switched  
+ARC - Archive status of the first program, this may be overwritten after the program is switched  
+  
+### NOSGUI  
+No variables  
+  
+### NOSCTRL
+G - getKey varible, overwrite at your own risk  
+prgmTEMP - Temporary program for running ASM and BASIC programs  
+prgmASM - ASM program data for running  
+SLOT - Selected Program Slot, overwrite at your own risk  
+  
+### NOSSET
+SET, G - Temporary value, may be overwritten after run  
+L5 - Color / Settings Data, formated as below:  
+  L5(0) - Primary Background  
+  L5(3) - Banner Background  
+  L5(6) - Primary Text  
+  L5(9) - Secondary Text  
+LOC - Location of cursor on menu  
+
+### NOSPROG  
+No Variables  
+  
+### NOSSUB  
+B, ICONX, ICONY, ICONCHAR, ICONCOLOR, SET, STATUS, POS - Temporary Variables, may be overwritten  
+COLORS - Has the conversions for OS to ICE colors, DO NOT OVERWRITE
+DISTRO - Current Distro name, can be set  
+VERSION - Current NOS build version, can be set  
+  
+## Modules  
+The current (v.0.5.1) module list and uses is below:  
+NOSSPRIT - Houses Sprite Data  
+NOSHEAD - Houses Starting Values  
+NOSSRH - Searches for, and arranges, programs into one list  
+NOSGUI - Holds the GUI parts that update on every next program call along with Icon display code, user customisable   
+NOSCTRL - Has all of the shell's controls, includes changing programs  
+NOSSET - Has all of the shells settings  
+NOSPROG - Hold built-in subprograms  
+NOSSUB - Has subprograms for shell, including Icon display, GUI setup, and data setup  
+  
+## Built-In Calls and Labels  
+Here are the Calls and Labels that you can use:  
+  
+### Calls:  
+TOOLBAR - This has the toolbar for pinned programs,  
+GUISTART - Sets up the base for the GUI, i.e no data, just background  
+ICONDISPLAY - Displays DCS header icon (if applicable)  
+DATASETUP - Has the setup for the originla values of the variables  
+  
+### Labels:  
+TOP - Top of the program  
+SEARCH - Before the Search module, in prgmNOS  
+GUI - Before the GUI module, in prgmNOS  
+SETTINGS - Before the Settings module, in prgmNOS