add TODO about compiling with -pedantic

Makefile

@@ -8,7 +8,7 @@ LIB := $(LIBDIR)/build/libTangerine.a
 
 CXX := g++
 # NOTE: have to set -O or -O1 here to get warnings for uninitialized variables
-CXXFLAGS := -std=c++11 -g -ggdb3 -O -Wall -Wuninitialized -pedantic \
+CXXFLAGS := -std=c++11 -g -ggdb3 -O -Wall -Wuninitialized \
 			-I$(LIBDIR)/include/ \
 			$(shell sdl2-config --cflags)
 LDFLAGS := $(shell sdl2-config --libs) -lGLEW -lGL

src/main.cpp

@@ -3,6 +3,7 @@
  * TODO:
  * - impulsive orbital maneuvers
  * - replace instances of glm:: with using directives
+ * - compile with '-pedantic' and fix macro warnings
  * - convert between satellite state vectors and orbital elements
  * - orbits with nu (true anom at T0) other than 0 degrees
  * - plane change maneuvers