manual update

[chnaccarato]

• remove "More" and extract its content directly to the panel
• change "Philosophy" --> "Methods"
• in "Methods" --> "Current approach" change the Language - Toplevel dialect - Village example
• in "Methods" --> "Map visualization" change the example according to the previous section

in "Chapters"

• update the link to the chapter template
• add link to lingglosses and glossing
• add info about rmarkdown tables

in "Maps"

• update the last two links on the page