Fix of multiple grammar and typographic mistakes

document/parts/appendix/plots.tex

document/parts/compression_program.tex

document/parts/conclusion.tex

document/parts/introduction.tex

document/parts/jpeg.tex

document/parts/jpeg2000_comp.tex

document/parts/lossless_compression.tex

document/parts/lossy_compression_analysis.tex

document/parts/lossy_compression_data.tex

document/parts/scalar_quantization.tex

document/parts/scalar_quantization_results.tex

document/parts/vector_quantization.tex

document/parts/vector_quantization_results.tex

document/thesis.tex