gnucash-docs maint: Multiple changes pushed

[Frank H.Ellenberger]

Updated	 via  https://github.com/Gnucash/gnucash-docs/commit/08581dcf (commit)
	 via  https://github.com/Gnucash/gnucash-docs/commit/1e5191f5 (commit)
	 via  https://github.com/Gnucash/gnucash-docs/commit/3137da6f (commit)
	from  https://github.com/Gnucash/gnucash-docs/commit/2b81a73c (commit)



commit 08581dcf82420067302a41b84559fb38b5b9caf5
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Sun May 17 05:33:58 2020 +0200

    Improve links to Selingers tutorials
    
    Use entities, also for titles

commit 1e5191f51f370b701fa4c2407a639d348b48206c
Author: Frank H. Ellenberger <frank.h.ellenberger at gmail.com>
Date:   Sun May 17 01:36:42 2020 +0200

    Minor fixes from the PR #138 discussion
    
    https://github.com/Gnucash/gnucash-docs/pull/138

commit 3137da6f9aae749d0851e13786da994a1cde43a8
Author: David Cousens <davidcousens at bigpond.com>
Date:   Sat May 9 12:42:40 2020 +1000

    Modifications to Guide Ch12 to include multi-currency transactions using trading accounts.
    
    Split the multi-currency transaction after the initial introduction into two sections. The first is the original dealing with the treatment of multicurrency transactions using manual recording of the gains and losses.  The second new section deals with gains and loss treatment using trading accounts. basic introduction to trading account concepts added and an example of a transfer of funds between accounts in different currencies is added (incomplete)
    Complete currency trading example
    
    
    typo and tag fixes
    
    
    typo and tag fixes
    
    
    tag and typo fixes
    
    
    type and tag fixes
    
    
    Updates to screenshots
    
    
    Fix up screenshots
    
    
    fix tags
    
    
    changes after proof reading
    
    
    tag mismatch fix
    
    
    Proof reading edits
    
    
    typo fix



Summary of changes:
 docbook/gnc-docbookx.dtd                           |    2 +
 guide/C/ch_currency.xml                            | 1685 ++++++++++++--------
 .../currency_trading_Price_Database_initial.png    |  Bin 0 -> 24169 bytes
 guide/C/figures/currency_trading_acct_setup.png    |  Bin 0 -> 43068 bytes
 guide/C/figures/currency_trading_acct_setup_2.png  |  Bin 0 -> 46005 bytes
 .../C/figures/currency_trading_accts_after_tfr.png |  Bin 0 -> 67385 bytes
 .../currency_trading_accts_after_trf_back.png      |  Bin 0 -> 64755 bytes
 guide/C/figures/currency_trading_balance_sheet.png |  Bin 0 -> 74115 bytes
 .../currency_trading_prices_after_trf_back.png     |  Bin 0 -> 28993 bytes
 .../C/figures/currency_trading_transfer_funds.png  |  Bin 0 -> 43137 bytes
 .../C/figures/currency_trading_transfer_trans1.png |  Bin 0 -> 56718 bytes
 .../C/figures/currency_trading_transfer_trans2.png |  Bin 0 -> 63095 bytes
 guide/C/figures/currency_trading_trf_back.png      |  Bin 0 -> 62770 bytes
 13 files changed, 1015 insertions(+), 672 deletions(-)
 create mode 100644 guide/C/figures/currency_trading_Price_Database_initial.png
 create mode 100644 guide/C/figures/currency_trading_acct_setup.png
 create mode 100644 guide/C/figures/currency_trading_acct_setup_2.png
 create mode 100644 guide/C/figures/currency_trading_accts_after_tfr.png
 create mode 100644 guide/C/figures/currency_trading_accts_after_trf_back.png
 create mode 100644 guide/C/figures/currency_trading_balance_sheet.png
 create mode 100644 guide/C/figures/currency_trading_prices_after_trf_back.png
 create mode 100644 guide/C/figures/currency_trading_transfer_funds.png
 create mode 100644 guide/C/figures/currency_trading_transfer_trans1.png
 create mode 100644 guide/C/figures/currency_trading_transfer_trans2.png
 create mode 100644 guide/C/figures/currency_trading_trf_back.png