More enhanced and comprehensive PHP date pattern formatting

[kartik-v]

• Parse all PHP date patterns for formatting a date i.e. d, D, j, l, N, S, w, z, W, F, m, M, n, t, L, o, Y, y, a, A, B, g, G, h, H, i, s, u, e, T, I, O, P, Z, c, r, U. Refer parseFormat method to understand formatting of date as per above format strings.
• timezone formatting enhancements
• New library properties intParts, tzParts, tzClip
• New Ordinal formatting method (that understads the S string appended with one of the char patterns in intParts)
• More Correct parsing of unix timestamp U format