Nselib

* functions added to capital market (fno_index_list)
* Issue fix with fetching previous day if holiday
* trading_holiday_calendar issue fixed

* index_data function issue fixes

* major nseindia api fixes

* nseindia api fixes

* nseindia data path changed

* functions added to capital market (var_begin_day, var_1st_intra_day, var_2nd_intra_day, var_3rd_intra_day, var_4th_intra_day, var_end_of_day, sme_bhav_copy, sme_band_complete, week_52_high_low_report)