Update V_0.4.0

• Added keyboard controls.
• Added 204 new entries in the dictionary.
• Made the marks colourful which would be helpful for the grammar understanding.
• Improved the graphic.
• Revised the following entries: alex, akyt, plu, am, amti, qah, yras, lisuvai, yra, ysi, yamte, ja, je, lqa, vk, aiin, vztu, kali, yre, sxuk, dalei, eeluz, lupbal, ushhm, olla, xlio, husj, xsiga, aosiple, xhjr, yras, pdep, rasib, gude, tair, tta, aitgutea, sxk, axhk, aosiple, ekin, ee, xbe, kap, ktap, kevin, agappx, du, qvdedein.