egnyte 0.1.0

• Initial CRAN release.
• Core file transfer functions: eg_read() and eg_write().
• Format-specific readers: eg_read_csv(), eg_read_delim(), eg_read_excel(), eg_read_sas(), eg_read_xpt(), eg_read_stata(), eg_read_spss(), eg_read_rds().
• Format-specific writers: eg_write_csv(), eg_write_delim(), eg_write_excel(), eg_write_xpt(), eg_write_stata(), eg_write_spss(), eg_write_rds().
• Directory listing with eg_list(), including recursive support.
• API key authentication via eg_auth().
• OAuth 2.0 support: Authorization Code flow (eg_oauth_authorize()), Resource Owner Password flow (eg_oauth_password()), and token refresh (eg_oauth_refresh()).